METRA BIOSYSTEMS INC
10-K405, 1997-09-29
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                            ------------------------
 
                                   FORM 10-K
 
    /X/  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
       OF THE SECURITIES EXCHANGE ACT OF 1934
 
     For the fiscal year ended June               Commission file Number 0-26234
                30, 1997
 
                            ------------------------
 
                             METRA BIOSYSTEMS, INC.
             (Exact name of Registrant as specified in its charter)
 
               CALIFORNIA                                   33-0408436
      (State or other jurisdiction                       (I.R.S. Employer
          of incorporation or                         Identification Number)
             organization)
 
              265 NORTH WHISMAN ROAD, MOUNTAIN VIEW, CA 94043-3911
             (Address of Registrant's principal executive offices)
 
                                 (650) 903-9100
              (Registrant's telephone number including area code)
 
        Securities registered pursuant to Section 12(b) of the Act: NONE
 
          Securities registered pursuant to Section 12(g) of the Act:
                         COMMON STOCK, $.001 PAR VALUE
                        PREFERRED SHARE PURCHASE RIGHTS
 
    Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  /X/ Yes  / / No.
 
    Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K  / /
 
    At August 30, 1997 there were 12,633,059 shares of Common Stock outstanding.
The aggregate market value of the voting stock held by non-affiliates of the
registrant was $22,161,706 based upon the closing price of the Common Stock at
August 30, 1997. Shares of Common Stock held by each officer and director and
each person who owns 5% or more of the outstanding Common Stock have been
excluded from this computation in that such persons may be deemed to be
affiliates. This determination of affiliate status is not necessarily a
conclusive determination for other purposes.
 
                      DOCUMENTS INCORPORATED BY REFERENCE
 
    Portions of the Proxy Statement of Registrant for the 1997 Annual Meeting of
Shareholders are incorporated in Part III of this Form 10-K.
 
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                             METRA BIOSYSTEMS, INC.
                                     INDEX
 
<TABLE>
<S>        <C>                                                                           <C>
PART I.
 
Item 1.    Business....................................................................          3
Item 2.    Properties..................................................................         21
Item 3.    Legal Proceedings...........................................................         21
Item 4.    Submission of Matters to a Vote of Security Holders.........................         21
 
PART II.
 
Item 5.    Market for Registrant's Common Equity and Related Stockholder Matters.......         22
Item 6.    Selected Financial Data.....................................................         22
Item 7.    Management's Discussion and Analysis of Financial Condition and Results of
             Operation.................................................................         23
Item 8.    Financial Statements and Supplementary Data.................................         28
Item 9.    Changes in and Disagreements with Accountants on Accounting and Financial
             Disclosure................................................................         48
 
PART III.
 
Item 10.   Directors and Executive Officers of the Registrant..........................         48
Item 11.   Executive Compensation......................................................         48
Item 12.   Security Ownership of Certain Beneficial Owners and Management..............         48
Item 13.   Certain Relationships and Related Transactions..............................         49
 
PART IV.
 
Item 14.   Exhibits, Financial Statement Schedules, and Reports on Form 8-K............         49
           Signatures..................................................................         53
</TABLE>
 
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                             INTRODUCTORY STATEMENT
 
    EXCEPT FOR HISTORICAL INFORMATION CONTAINED IN THIS ANNUAL REPORT ON FORM
10-K, THE MATTERS DISCUSSED HEREIN ARE FORWARD-LOOKING STATEMENTS THAT ARE
SUBJECT TO CERTAIN RISKS AND UNCERTAINTIES THAT COULD CAUSE ACTUAL RESULTS TO
DIFFER MATERIALLY FROM THOSE PROJECTED. THESE RISKS AND UNCERTAINTIES INCLUDE,
BUT ARE NOT LIMITED TO, THE RISK THAT THE COMPANY'S PRODUCTS WILL NOT ACHIEVE
MARKET ACCEPTANCE, THE COMPANY'S RELIANCE UPON COLLABORATIVE RELATIONSHIPS AND
THE INTENSE COMPETITION IN THE MARKET FOR BIOCHEMICAL MARKERS, AS WELL AS THE
OTHER RISKS AND UNCERTAINTIES DESCRIBED HEREIN, UNDER THE HEADING "RISK FACTORS"
IN THE COMPANY'S PROSPECTUSES DATED APRIL 23, 1996 AND JUNE 30, 1995,
RESPECTIVELY, DELIVERED IN CONNECTION WITH THE COMPANY'S PUBLIC OFFERINGS, AND
AS DESCRIBED IN THE COMPANY'S ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED JUNE
30, 1996, AND OTHER RISKS INCLUDED FROM TIME TO TIME IN THE COMPANY'S OTHER SEC
REPORTS AND PRESS RELEASES, COPIES OF WHICH ARE AVAILABLE FROM THE COMPANY UPON
REQUEST. THE COMPANY ASSUMES NO OBLIGATION TO UPDATE ANY FORWARD-LOOKING
STATEMENTS CONTAINED HEREIN. THIS REPORT ON FORM 10-K INCLUDES TRADEMARKS OF
COMPANIES OTHER THAN THE COMPANY.
 
                                     PART I
 
ITEM 1. BUSINESS
 
    Metra Biosystems, Inc. (the "Company" or "Metra") is a leader in developing
and commercializing diagnostic products for the detection and management of
metabolic bone diseases and disorders. The Company's strategy is to offer a
portfolio of diagnostic products that will provide physicians with comprehensive
clinical information regarding the metabolism of bone and other connective
tissues. The Company has developed and is currently marketing for either
research use or clinical use two immunodiagnostic tests to assess bone
resorption, two immunodiagnostic tests to assess bone formation and one
immunodiagnostic test to assess bone growth disorders. In addition, the Company
is currently developing a portable ultrasound device designed to assess bone
fragility, a bone-resorption test for use in the physicians offices, a
biochemical test to detect bone cartilage disorders, serum versions of its
Pyrilinks-Registered Trademark--D and Pyrilinks-Registered Trademark- bone
resorption tests (currently urine based), and other biochemical tests to detect
bone and joint disorders.
 
BUSINESS STRATEGY
 
    The Company is a leader in developing and commercializing innovative
diagnostic products for the detection and management of metabolic bone diseases
and disorders. The Company's general business strategy is comprised of certain
key elements: first, the continual development of new diagnostic products to
complement the Company's existing products; second, the establishment of
collaborative relationships with corporate partners for co-promotion (medical
education and awareness); third, the development of partnerships to maximize
distribution capabilities with established diagnostic companies; and fourth, the
expansion of the Company's own direct sales and distribution capabilities.
 
    During fiscal 1997 a number of significant events which support the
execution of the four basic elements of the Company's business strategy
occurred, including:
 
    - The establishment of a marketing and co-promotion alliance in the United
      States with Berlex Laboratories ("Berlex"), a provider of female
      healthcare products including hormone replacement products, and Norland
      Medical Systems, a provider of imaging systems for bone density
      measurement. This alliance will utilize the detail pharmaceutical sales
      force of Berlex to promote all three companies' products to OB/GYNs.
 
    - The establishment of a marketing alliance in the United States with
      Mission Pharmacal, a provider of calcium supplements; and a national
      supplier of laboratory services. The alliance will focus on educating
      consumers about Metra's bone resorption products and Mission Pharmacal's
      calcium supplements as well as provide information regarding where to
      obtain laboratory testing.
 
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    - The worldwide launch of the Company's lead product for bone resorption,
      Pyrilinks-D, on the automated immunoassay testing systems of Chiron
      Diagnostics and Diagnostic Products Corporation.
 
    - One of the Company's diagnostic partners in Japan, Sumitomo
      Pharmaceuticals, obtained regulatory approval for clinical use of the
      Company's Pyrilinks-D test for bone resorption in the Japanese market.
 
    - In January 1997, the American Medical Association ("AMA") published a CPT
      code to facilitate the reimbursement of the Company's Pyrilinks-D test.
      Subsequently, certain medical carriers are starting to establish
      reimbursement levels.
 
    The key elements of the Company's strategy are based upon a premise that
currently only a small percentage of the population at risk for certain bone and
connective tissue diseases and disorders, such as osteoporosis, rheumatoid
arthritis (RA), and osteo arthritis (OA), are diagnosed early enough for
preventative treatment to be effective. The Company believes that the historical
lack of consistent therapeutic intervention can be traced in part to the limited
availability of timely, cost-effective and accurate methods to detect and
monitor these diseases. The Company believes the demand for its products will be
driven in part by physicians' need to easily, inexpensively and accurately (i)
identify those persons most at risk before significant onset of these diseases,
(ii) quantify the parameters of each patient's disease progression, (iii)
determine therapeutic dosage and duration of therapy and (iv) monitor the
effectiveness of, and compliance with, prescribed therapies.
 
OSTEOPOROSIS
 
    The most widespread metabolic bone disease is osteoporosis, a disorder
characterized by a decrease in bone mass that leads to increased susceptibility
to fractures, particularly those of the hip, spine and wrist. There are two
major types of osteoporosis. The most common type is primary osteoporosis, which
includes post-menopausal osteoporosis, resulting from an estrogen deficiency in
women, and senile osteoporosis, an age-related condition primarily affecting men
and women over age 75. Secondary osteoporosis occurs as a side effect of some
medications, or as a consequence of another disease that causes a decrease in
bone mass.
 
    Osteoporosis is often called the "silent disease" because the process of
bone loss causes no physical symptoms. In many cases, doctors and patients are
not aware of the problem until certain bones in the skeletal system have become
so weak that a sudden strain, bump, or fall causes a fracture. If diagnosed
early enough, the rate of bone loss can be reduced using one or a combination of
drug therapies, dietary supplements, or changes in lifestyle. Consequently,
diagnosis of bone loss and preventive intervention is important for a physician
to develop an effective care plan for the patient.
 
    According to the National Osteoporosis Foundation ("NOF"), osteoporosis
afflicts over 25 million Americans and over 200 million people worldwide. In the
United States, approximately 1.5 million osteoporosis-related fractures occur
each year, including more than 250,000 hip fractures, 500,000 vertebral
fractures and 240,000 wrist fractures. For Caucasian women, it is estimated that
the risk of hip fractures approximates the combined risks of breast, endometrial
and ovarian cancers. In addition, approximately one in three women over age 65
will suffer vertebral fractures. By age 75, approximately one-third of all men
will also be affected by osteoporosis. Industry studies estimate that the
lifetime risk of hip fracture in men approximates the risk of prostate cancer.
 
    In the United States, annual cost to the Medicare system to treat fractures
among older adults in 1995 was $13.8 billion. The most severe
osteoporosis-related fracture is that of the hip. Over 95% of
osteoporosis-related hip fractures require hospitalization, between 12% and 20%
result in fatality from other health complications arising from the fractures
and half of the patients who survive are unable to walk
 
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unassisted for the rest of their lives. Another 25% are confined to long-term
care under supervised conditions.
 
OTHER BONE-RELATED DISEASES
 
    In addition to developing diagnostic tests to assess osteoporosis, assays
for a number of other diseases that can adversely affect bone remodeling (a
metabolic process which consists of bone formation and resorption or loss),
including Paget's disease of bone, cancers that metastasize to bone,
hyperthyroidism, hyperparathyroidism, osteoarthritis, and growth hormone
deficiency are also being developed. Unlike osteoporosis, these diseases do have
physical symptoms that may alert a physician to the possibility of bone loss
and, accordingly, the need to monitor the bone remodeling process with
diagnostic tests.
 
THERAPIES FOR OSTEOPOROSIS
 
    During the past several decades, a number of therapies have been developed
to address bone diseases and disorders. Most of these are prescription
therapies, including hormone replacement therapy ("HRT"), calcitonins and
bisphosphonates, and are focused on preventing further bone loss rather than
systemically forming new bone. Other products include dietary supplements that
are available over-the-counter, such as calcium and vitamin D.
 
    The Company believes the market for drugs to treat osteoporosis will grow as
a result of several factors, including worldwide aging of the population,
heightened public awareness of osteoporosis, FDA approval of new therapeutics,
and the development and availability of effective diagnostic tests.
 
        HORMONE REPLACEMENT THERAPY.  Hormone replacement therapies, such as
    estrogen and progestin, are the most frequently prescribed drugs given to
    alleviate symptoms in post-menopausal women. HRT products act to decrease
    bone loss (are anti-resorptive) and are also approved for preventive
    treatment of osteoporosis. There are a number of estrogen products currently
    approved by the FDA and available worldwide for use in preventing or
    managing osteoporosis, including Berlex Laboratories' Climara, Wyeth-Ayerst
    Laboratories' Premarin, Ciba-Geigy Ltd.'s Estraderm, and Bristol-Myers
    Squibb Company's Estrace. In 1994, total sales of hormone replacement
    therapies, including oral, transdermal, and other formulations, were in
    excess of $1.5 billion in the United States.
 
        CALCITONINS.  Calcitonin acts to slow bone resorption and may be a
    viable substitute for estrogen as an anti-resorptive drug, especially in
    male patients or in those female patients who do not take hormone
    replacement therapy. In the United States, Sandoz Ltd.'s Miacalcin and
    Rhone-Poulenc Rorer Inc.'s Calcimar are FDA-approved calcitonin products.
 
        BISPHOSPHONATES.  Bisphosphonates are approved for the prevention and
    treatment of osteoporosis. Fosamax, a bisphosphonate from Merck & Co., Inc.
    was approved in late 1995 for the treatment of patients with low bone
    mineral density, and in 1997 expanded the claims to prevention of bone loss.
    Additionally, Didronel, a bisphosphonate from The Procter & Gamble Company,
    is currently approved for use in treating Paget's disease. Several next
    generation bisphosphonates are in various stages of development.
 
        OTHERS.  Other products used for the prevention of bone loss include
    vitamin D and calcium supplements such as Citracal, a leading calcium
    supplement from Mission Pharmacal. In addition, injectible vitamin D
    metabolites are a prescribed therapy for preventing bone loss that are
    widely used in Japan but are not approved in the United States. There are a
    number of other new therapies under development, including estrogen analogs
    designed to minimize the side effects of HRT and slow release sodium
    fluoride, which is believed to increase bone mineral density.
 
                                       5
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OSTEOPOROSIS-RELATED DIAGNOSTICS
 
    Diagnostics for bone health are based upon two paradigms; first, imaging
technologies which provide a primary assessment of bone density, commonly
referred to as the STATE of bone health; and second, biochemical tests which
provide real time information on the metabolic process of bone resorption and
formation, or RATE of change. The Company believes that as the medical
profession becomes more aware of the diagnostics and therapies available for
bone health, and consumers understand the benefits of early assessment of bone
health, the two types of diagnostics will provide highly complementary
information referred to as the "rate and state".
 
    IMAGING TECHNOLOGIES
 
    Imaging technologies provide varying degrees of sensitivity for the
assessment of bone density and have traditionally been based on x-ray
technology. The most advanced imaging technique currently available is Dual
Energy X-ray Absorptiometry (DXA) and can be performed in whole body scans or in
partial or peripheral measurements (such as the forearm, wrists, heel bone,
etc).
 
    Recently, additional technologies, such as ultrasound, have been developed
that have the potential to be less expensive than DXA, do not involve radiation,
and may provide additional diagnostic information concerning bone structure and
quality.
 
    BIOCHEMICAL TESTS
 
    Biochemical tests have been developed that can be used to assess the dynamic
rates of bone resorption and bone formation. Specifically, they measure certain
by-products of the bone remodeling process and through clinical trials, the
manufacturers of such tests have established normal and abnormal ranges.
 
    The Company believes its biochemical tests can be particularly useful at the
early stages of accelerated bone loss for determining individuals "at risk", and
upon the initiation of therapeutic intervention, to monitor the effectiveness of
the particular therapy.
 
ARTHRITIS
 
    Arthritis is generally characterized by joint pain and swelling. There are
more than 100 types of arthritis affecting approximately 40 million people in
the United States. The two most prevalent forms of arthritis are osteoarthritis
("OA") and rheumatoid arthritis ("RA"). Although the causes of OA and RA are
very different, both diseases result in the common problem of joint destruction.
 
    Osteoarthritis is the most common form of arthritis. The prevalence of
osteoarthritis among individuals aged 45 to 50 is estimated to be approximately
30%, and approaches a 60% prevalence rate for individuals over 65 years of age.
Osteo, or degenerative, arthritis is a disease believed to result from the
breakdown of cartilage in a specific joint or joints and bone proximate to
joints. Osteoarthritis can affect any type of joint, but the disease most
commonly occurs in weight bearing joints such as the hips, knees and spine.
 
    Rheumatoid arthritis is the second most common form of arthritis. In North
America, it is estimated that two million people are afflicted with this
condition, and in excess of $200 million dollars is spent each year for the care
and treatment of the disease. Rheumatoid arthritis can occur at any age, but the
onset of the disease typically peaks between ages 35 and 45. This disease is
thought to be a systemic autoimmune disorder in which the synovium becomes
inflamed, causing hot, tender, and swollen joints. Only the freely mobile joints
such as hands, feet and knees are affected by this form of arthritis. As the
disease progresses, the cartilage and eventually the bone are destroyed by
various autoimmune-mediated enzymatic responses. This process results in
continuous pain, progressive deformity, and disability.
 
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ARTHRITIS THERAPIES
 
    No approved treatments stop or reverse osteoarthritis. Current treatment for
OA is primarily focused on reducing pain, minimizing inflammation, and improving
joint function. Physicians most commonly recommend analgesics to reduce pain and
non-steroidal anti-inflammatory drugs ("NSAIDs") such as ibuprofen to reduce
inflammation. In advanced OA, more invasive measures such as injection of
steroids into the joint space, arthroscopic surgery, and partial or total joint
replacement are examples of treatment options.
 
    For treatment of RA, physicians commonly prescribe NSAIDs in an effort to
reduce inflammation. Additionally, doctors often prescribe other non-specific
drugs designed to reduce the body's immune response and associated inflammation.
The effectiveness of these therapies is variable from patient to patient, and
may involve various side effects and complications.
 
    There are numerous pharmaceutical companies working to develop more
effective therapies which include the ability to regenerate cartilage to treat
OA and RA. During the early stages of arthritis, the patient is not necessarily
aware of the progression of the disease until the associated pain and swelling
occurs accompanied by reduced joint mobility. In certain patients who are
experiencing pain, there may be little correlation between the severity of
active disease and the amount of pain. The Company believes that if a
biochemical marker test were introduced and integrated into the overall health
care of a patient, it might help improve early detection of arthritis and enable
more effective treatments with emerging therapies along with subsequent
therapeutic drug monitoring.
 
ARTHRITIS DIAGNOSTICS
 
    Many non-specific diagnostic tools for OA and RA exist, but are not disease
specific enough for arthritis to confirm a diagnosis of either type of disease,
or accurately assess disease progression. Current diagnosis of arthritis is
based on:
 
    - Medical history and a physical examination;
 
    - Symptoms, i.e., swelling, red and hot joints, nodules under the skin, and
      stiffness;
 
    - X-rays (which are not designed for detection of soft tissue disorders)
      which can detect a pattern of visible damage only after multiple
      exposures; and
 
    - In the case of RA, laboratory tests for anemia, low white-blood-cell
      count, rheumatoid factor ("RF") and erythrocyte sedimentation rate
      ("ESR"). Anemia can be an accompanying symptom of rheumatoid arthritis but
      is not caused by or otherwise necessarily correlated to arthritis. RF is
      present in 85% of people with rheumatoid arthritis, but also does not
      necessarily indicate rheumatoid arthritis. ESR indicates a systemic
      inflammatory condition but not necessarily rheumatoid arthritis.
 
MARKET FOR IMMUNODIAGNOSTIC TESTS
 
    Diagnostic tests are widely used for both research and routine clinical use.
Academic and clinical researchers in universities, teaching hospitals,
pharmaceutical companies and government research units, such as the National
Institutes of Health, use research products routinely. However, not all research
products are introduced for routine clinical use for many reasons, including a
lack of clinical utility or cost of obtaining regulatory approval.
 
    Immunodiagnostic tests are performed in a variety of manual or automated
formats. A common format for research and clinical testing is the microtiter
plate format utilizing enzyme immunoassay ("EIA") detection. EIA utilizes an
immune reaction, that is, an antibody reacting with an antigen, and the
detection of the reaction using enzymes which are attached to the reactants as
indicators. Although this technology is considered an established industry
standard, a manual format is relatively slow, has low
 
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throughput, and requires skilled technicians. Instrument systems are in routine
use that automate tests to increase throughput and decrease the cost per test.
Most of the widely used immunodiagnostic tests have been adapted to automated
systems. These formats are used in hospitals and clinical laboratories
throughout the world. The Company believes that, in addition to the automated
systems, more convenient and faster formats are required for physicians' offices
or for home use.
 
PRODUCTS
 
    The Company has developed and is currently marketing for research and
clinical use four immunodiagnostic tests to assess bone resorption and formation
and one immunodiagnostic test to assess certain bone growth disorders. In
guidelines to pharmaceutical companies developing new osteoporosis drugs, the
FDA recommends using a combination of three biochemical markers that together
detect both resorption and bone formation to assess efficacy as part of their
pre-clinical and clinical testing. Metra has developed immunoassays which meet
all three of these requirements. Metra's immunoassays are (i) pyridinium
crosslinks, (ii) osteocalcin and (iii) bone-specific alkaline phosphatase. The
Company currently offers tests for each of these biochemical markers.
 
    The Company's Pyrilinks tests are proprietary and measure specific
biochemical markers. Although the Company's other tests such as Alkphase-B,
NovoCalcin, and Prolagen-C measure markers that are not proprietary, and similar
tests are available from other companies, these tests allow the Company to offer
a more complete line of relevant clinical and research use tests to measure
different aspects of bone metabolism. The following table identifies the
Company's products, their application, and their current regulatory status in
most major markets throughout the world.
<TABLE>
<CAPTION>
         MARKETED PRODUCTS                                     MARKETING STATUS
- -----------------------------------      ------------------------------------------------------------
<S>                                  <C>
BONE RESORPTION
  Pyrilinks-Registered Trademark--D  -   Cleared for clinical use in US*, Europe, Japan and
                                           Asia/Pacific
                                     -   Available in automated formats through Chiron Diagnostics
                                           (ACS:180 DPD) and Diagnostic Products Corporation
                                           (IMMULITE-Registered Trademark- PYRILINKS-D)
                                     -   Cleared for clinical use in Japan as Osteolinks-DPD for
                                           marketing by Sumitomo Pharmaceuticals Ltd.
  Pyrilinks-Registered Trademark-    -   Cleared for clinical use in US*, Europe, and Asia/Pacific
                                     -   Research use only in Japan
BONE FORMATION
  Alkphase-B-Registered Trademark-   -   Cleared for clinical use in US*, Europe, and Asia/Pacific
                                     -   Research use only in Japan
  NovoCalcin-Registered Trademark-   -   Cleared for clinical use Europe and Asia/Pacific
                                     -   Research use only in US and Japan
GROWTH DISORDERS
  Prolagen-C-Registered Trademark-   -   Cleared for clinical use in Europe and Asia/Pacific
                                     -   Research use only in US and Japan
 
<CAPTION>
      PRODUCTS IN DEVELOPMENT                                       STATUS
- -----------------------------------      ------------------------------------------------------------
<S>                                  <C>
Chondrex-TM- immunoassay for         -   Development--Expected to be available for research use only
  arthritis                                in calendar 1998
Portable ultrasound device to        -   Development--Expected to be launched internationally in
  assess bone fragility                    calendar 1998
Point-of-care version of             -   Development--Expected to be available for clinical use in
  Pyrilinks-D on Cholestech's L-D-X        calendar 1998
  Immunoassay System
Serum Pyrilinks                      -   Development--Expected to be available for research use in
                                           calendar 1998
Serum Pyrilinks-D                    -   Development--Expected to be available for research use in
                                           calendar 1998
</TABLE>
 
- ------------------------
*   Received 510(k) clearance from US Food and Drug Administration
 
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SALES AND MARKETING
 
    The Company's products are currently being marketed internationally for both
clinical and research use. The market for the Company's products consists of
clinical and reference laboratories, academic and clinical researchers in
universities, and physicians. The Company's approach is to initially market the
tests for research purposes to academic and clinical researchers in
universities, teaching hospitals, pharmaceutical companies and government
institutions. As regulatory clearances are obtained for clinical use, clinical
reference laboratories, hospital laboratories, and physicians are also targeted
as customers.
 
    The Company's marketing and sales strategy for its manual tests is to
provide its products on a worldwide basis either through its direct sales force
in selected countries or through established country specific distributors. The
Company currently has direct operations in the United States, United Kingdom,
and Italy and works with over 30 distributors of diagnostic products throughout
the rest of the world that have established distribution channels. The Company's
distribution alliances include Hoechst Behring (France), DPC Biermann (Germany),
Dade Diagnostics (Australia) and Sumitomo Pharmaceuticals, Inc. (Japan). Product
revenues from one distributor constituted 15%, 12% and 11% of total revenues for
the years ended June 30, 1997, 1996 and 1995, respectively. Product revenues
from another distributor constituted 12% of total revenues for the year ended
June 30, 1995. The loss (or poor performance) of one or more of these
distributors or the inability to find new distributors could have a material
effect on the Company's business, financial condition and results of operations.
The Company has limited experience in sales, marketing and distribution of its
products. The Company intends to expand its marketing staff and direct sales
force, and there can be no assurance the Company will do so cost-effectively, or
that the Company's direct sales and marketing efforts will be successful.
 
    International product sales accounted for approximately 77%, 78% and 78% of
product revenues for the fiscal years ended June 30, 1997, 1996, and 1995,
respectively. The Company expects that such sales will continue to account for a
significant portion of the Company's revenues in the future. In order to
successfully manage international sales, the Company may need to establish
additional foreign operations, hire additional personnel and recruit additional
international distributors and commissioned representatives. This will require
significant management attention and financial resources and could adversely
affect the Company's operating margins. In addition, to the extent the Company
is unable to effect these additions in a timely manner, the Company's growth, if
any, in international sales will be limited, and the Company's business,
financial condition and results of operations could be materially adversely
affected. In addition, there can be no assurance that the Company will be able
to maintain or increase international sales of the Company's products. The
Company's international sales to distributors are currently denominated in
United States dollars. As a result, increases in the value of the United States
dollar relative to foreign currencies could make the Company's products more
expensive and, therefore, potentially less competitive in markets served by such
distributors. Additional risks inherent in the Company's international business
activities generally include unexpected changes in regulatory requirements,
tariffs and other trade barriers, longer accounts receivable payment cycles,
difficulties in managing international operations, potentially adverse tax
consequences including restrictions on the repatriation of earnings, and the
burdens of complying with a wide variety of foreign laws. There can be no
assurance such factors will not have a material adverse effect on the Company's
future international sales and consequently, the Company's business, financial
condition and results of operations.
 
    The Company provides its products to the market in a microtiter plate
format, commonly referred to as a manual kit, through the Company's direct sales
force or distribution network throughout the world. In order to promote a broad
acceptance of its technology and, in particular, its lead product for bone
resorption, Pyrilinks-D, the Company has established collaborations with a
number of diagnostic companies that have an existing installed base of high
speed, automated laboratory testing systems. These partners include Abbott
Laboratories, Bayer Corporation, Chiron Diagnostics, and Diagnostic Products
Corporation (DPC). Together, these partners represent up to 80% of the installed
base of high throughput, automated immunoassay testing systems. In late fiscal
1997, both Chiron Diagnostics and DPC launched
 
                                       9
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the Company's Pyrilinks-D technology on their automated systems and commenced
marketing and selling efforts. The Company expects Abbott Laboratories and Bayer
Corporation to launch the Pyrilinks-D technology on their automated systems
after their 510(k) clearances are received. The Company receives a royalty on
sales from each of these automated partners.
 
    The Company will increasingly depend on its partners to sell the Company's
tests in automated formats. In particular, the Company relies on collaborative
partners to adapt the Company's technology to high-volume automated instruments
such as those sold by Abbott, Bayer, Chiron and DPC. Substantially all of the
Company's collaborative agreements are non-exclusive, and therefore such
partners are free to enter into similar agreements with third parties, including
the Company's competitors. In addition, the Company has not developed physician
office or home-use adaptations of its products and there can be no assurance
that the Company or its collaborative partners will either develop such formats,
obtain regulatory approvals, and sell the Company's tests on their formats.
There can be no assurance that any of these partners will perform their
contractual obligations or that such partners will not terminate their
agreements. The failure to adapt the Company's products to different formats and
instruments, or commercialize or co-promote such products, could have a material
adverse effect on the Company's business, financial condition and results of
operations.
 
    The Company expects to enter into additional collaborative agreements in the
future to develop, commercialize and sell its products. There can be no
assurance that the Company will be able to negotiate acceptable agreements in
the future, or that such new agreements or existing agreements will be
successful. In addition, there can be no assurance that the Company's
collaborative partners will not pursue alternative competing technologies.
 
    The Company believes that educating patients and physicians about the
long-term health benefits and cost-effectiveness of diagnosis and treatment of
bone diseases and disorders at an early stage is critical to market acceptance
for the Company's products. The Company believes the trend toward management of
health care costs in the United States will lead to increased awareness of and
emphasis on disease prevention, and as a result, will increase demand for
cost-effective diagnostic tests.
 
    The Company has developed a number of proprietary marketing programs aimed
at educating both patients and physicians including, but not limited to:
establishing collaborative relationships with other pharmaceutical, diagnostic,
and laboratory testing companies; the establishment of a speakers bureau which
is comprised of nationally and regionally recognized physicians and researchers
who serve to educate their local communities; the sponsorship of a clinical
summit and director of medical education program on bone health in which leading
physicians and researchers from around the world discuss the current state of
assessing all elements of bone health; and numerous other programs managed
within the Company's marketing and sales organization all aimed at educating
patients and physicians.
 
    In the second half of fiscal 1997, the Company entered into two alliances in
the United States which the Company believes will further extend Metra's medical
educational focus. First, a three-way co-promotion agreement with Berlex
Laboratories, a provider of female healthcare products and in particular
Climara, a seven-day estrogen patch currently approved for marketing by the FDA
in the US, and, Norland Medical Systems ("Norland"), a distributor of imaging
systems that provide the current state of bone health. Under the terms of this
agreement, the companies will market to the OB/GYN physicians a suite of
products for the management of the symptoms and problems of menopause for women.
To reach the OB/ GYNs, the companies will utilize the direct detail
pharmaceutical force of Berlex Laboratories that call on over 30,000 OB/GYNs.
The Company will pay Berlex approximately $3.0 million for promotional
activities over the first year of the promotional agreement, record an expense
for the fair value of warrants issued of approximately $0.5 million, and pay
commissions on increased sales of the Company's Pyrilinks-D product. To the
extent Norland sells any scanning systems as a result of this promotional
alliance, Metra will receive a commission on such sales.
 
                                       10
<PAGE>
    Second, the Company entered into an alliance with two parties, Mission
Pharmacal and a leading provider of laboratory testing services, focused on
generating demand through consumers. Under the terms of this agreement the
companies will work together to educate consumers about assessing the current
rate of bone loss (Metra's Pyrilinks-D), the use of Citracal, which is the
second largest calcium supplement sold over the counter in the United States and
manufactured by Mission Pharmacal, and where to obtain the laboratory testing to
assess the effectiveness of the calcium supplement. One feature of the program
is to include information in every box of Citracal sold in the United States
that discusses the elements of the program as outlined. There are no material
financial commitments between the parties to this agreement.
 
    The Company will need to rely on current and any future collaborative
partners to help build market awareness and acceptance of the Company's
products. The Company, together with its partners, will continue to originate
research and clinical studies to demonstrate and explain how the Company's
products relate to improvements in early detection, disease management and drug
compliance. The commercial success of the Company's products will depend upon
their acceptance by the medical community and third-party payers as clinically
useful, cost-effective and safe. Market acceptance will depend on several
factors, including the establishment of clinical utility of these biochemical
tests, the receipt of regulatory clearances where required, the development of
diagnostic tests that can be processed using commercially available automated
systems, the availability of third-party reimbursement, extensive physician
education and the approval and commercial acceptance of therapies for the
treatment of osteoporosis. There can be no assurance that the Company's products
will gain market acceptance. Failure to achieve market acceptance would have a
material adverse effect on the Company's business, financial condition and
results of operations.
 
RESEARCH AND DEVELOPMENT
 
    The Company's research and development efforts are currently focused in four
principal areas: (i) discovery and development of new biochemical marker tests
focused in the area of bone and cartilage diseases, (ii) conducting clinical
studies designed to broaden the clinical claims for its existing products; (iii)
formatting of Metra's existing tests in alternative formats to address different
segments of the diagnostic testing market; and (iv) development of its
ultrasound technology. The Company's expense for the increasing research and
development efforts for the years ended June 30, 1997, 1996, and 1995 was $5.7
million, $4.3 million, and $3.7 million, respectively.
 
    NEW BONE AND CARTILAGE TESTS
 
    The Company has entered into a license agreement with NovaDx Inc. to develop
and manufacture a microtiter plate assay for the measurement of YKL-40
("Chondrex"), a novel glycoprotein which has been shown to be significantly
elevated in OA and RA patients. The Company believes that YKL-40 may provide the
basis for a diagnostic test for the detection and management of OA and RA.
 
    The Company is funding internal and third-party research and development
efforts designed to identify additional markers for bone and other connective
tissue conditions and develop new immunoassays to measure markers that it
believes will have clinical utility. As new immunodiagnostic tests are
developed, the Company intends to offer them first to researchers, and to the
extent such researchers in the medical community validate the clinical utility
of the new tests, the Company will further develop and commercialize the new
tests based on existing immunodiagnostic testing formats. The Company currently
sponsors research at institutions including The Rowett Research Institute and
Sheffield University in the United Kingdom.
 
                                       11
<PAGE>
    CLINICAL STUDIES
 
    The Company is conducting clinical studies designed to gather data to submit
to the FDA for clearance to market the Company's existing products for broader
clinical claims. The Company is investigating use of its products in
applications including therapeutic drug monitoring, and fracture risk
assessment.
 
    ALTERNATIVE TEST FORMATS
 
    The Company has a collaborative agreement to develop and manufacture its
Pyrilinks-D test in a radioimmunoassay ("RIA") format which was launched for
clinical use in France in May, 1996. Reimbursement was recently established in
France for both RIA and EIA formats. The Company believes that less complicated
and capital intensive formats may be more suitable for decentralized testing in
physician office laboratories, small clinics, satellite laboratories and for
home use. Metra is also reformatting its lead bone resorption product,
Pyrilinks-D, for the Cholestech point-of-care analyzer (L-D-X) for use in the
physicians' offices.
 
    ULTRASOUND TECHNOLOGY
 
    In order to offer a broader portfolio of products to provide physicians with
more comprehensive clinical information regarding bone, Metra acquired Osteo
Sciences Corporation, a company developing applications of ultrasound technology
to bone based on proprietary algorithms and product designs. The Company is
developing a portable ultrasound device designed to evaluate certain
characteristics of bone that are associated with bone weakness and bone quality.
The target market for the device will be for physicians' offices or small group
practices. The Company expects this device will provide physicians and patients
with a convenient and cost effective alternative to the currently available
imaging techniques for assessing bone.
 
    There can be no assurance that Metra will be successful in developing new
products or that new products developed by the Company will receive necessary
government approval or, if approved, will gain market acceptance. Any failure by
the Company to successfully develop and introduce new products could have a
material adverse effect on the Company's business, financial condition and
results of operations.
 
MANUFACTURING
 
    The Company's manufacturing operations are fully integrated and consist of
antibody production, reagent purification, reagent and microtiter plate
processing, filling, labeling, packaging and distribution. If the Company
experiences significant demand for its products, the Company will have to
manufacture its products in commercial quantities in compliance with regulatory
requirements at acceptable costs, and expend significant capital resources to
develop large-scale manufacturing capabilities. If the Company is unable to
develop large-scale manufacturing capabilities, the Company's competitive
position and financial condition would be adversely affected. Failure to
increase production volumes, if required, in a cost-effective manner or lower
than anticipated yields or production constraints encountered as a result of
changes in the manufacturing process could result in shipment delays as well as
increased manufacturing costs, which could have a material adverse effect on the
Company's business, financial condition and results of operations.
 
    The majority of raw materials and purchased components used to manufacture
the Company's products are readily available. However, certain of these
materials are obtained from a sole supplier or a limited group of suppliers. The
Company does not maintain long-term agreements with any of its suppliers. The
reliance on sole or limited suppliers and the failure to maintain long-term
agreements with suppliers involves several risks, including the inability to
obtain an adequate supply of required raw materials and components and reduced
control over pricing, quality and timely delivery. Although the Company attempts
to minimize its supply risks by maintaining an inventory of raw materials and
continuously evaluating other
 
                                       12
<PAGE>
sources, any interruption in supply could have a material adverse effect on the
Company's business, financial condition and results of operations.
 
    The Company's business, financial condition and results of operations would
be adversely affected by the inability to obtain working capital, satisfactory
manufacturing facilities, equipment and qualified manufacturing personnel. In
addition, the Company's manufacturing facilities and its operations are subject
to periodic inspections conducted by the FDA and equivalent inspections
conducted by State of California officials, and its operations undergo current
good manufacturing practices compliance inspections conducted by the FDA and
equivalent inspections conducted by state officials. Because the Company has
received FDA clearance to market certain of its products for clinical use, the
Company expects that its facilities will be inspected by the FDA and by state
authorities. Failure to comply with applicable regulatory requirements can
result in, among other things, fines, suspension or withdrawal of clearances or
approvals, seizures or recalls of products, operation restrictions and criminal
prosecutions. Furthermore, changes in existing regulations or adoption of new
regulations could prevent the Company from obtaining, or affect the timing of,
future clearances or approvals. There can be no assurance that the Company will
be able to obtain necessary regulatory clearances or approvals on a timely basis
or at all. Delays in receipt of or failure to receive such clearances or
approvals or loss of previously received clearances or approvals could have a
material adverse effect on the Company's business, financial condition and
results of operations.
 
    In September 1996, the Company received ISO 9001 certification for its
quality management systems. The Company's certification is officially recognized
by European and North American authorities and is accepted worldwide, and will
become a requirement for doing business in some countries in the future.
 
    The Company faces an inherent risk of exposure to product liability claims
in the event that the use of its products is alleged to have resulted in adverse
effects to a patient. The Company maintains a general insurance policy which
includes coverage for product liability claims. The policy is limited to a
maximum of $1.0 million per product liability claim and an annual aggregate
policy limit of $1.0 million. There can be no assurance that liability claims
will not exceed the coverage limits of such policy or that such insurance will
continue to be available on commercially reasonable terms or at all.
Consequently, a product liability claim or other claim with respect to uninsured
liabilities or in excess of insured liabilities could have a material adverse
effect on the Company's business, financial condition and results of operations.
 
COMPETITION
 
    Competition in the market for products that diagnose and monitor bone and
other connective tissue diseases and disorders is intense and expected to
increase. The Company currently competes with other medical technology
companies, biotechnology companies, pharmaceutical companies and research and
academic institutions, both in the United States and abroad. Metra believes that
its most significant competitors in the area of biochemical tests include
Bio-Rad Laboratories, a life sciences company, DSL, a diagnostic company that in
1996 received 510(k) clearance from the FDA to market Osteometer's bone
resorption product in the United States; IncStar, a diagnostic company; Quest
Diagnostics, a research laboratory and diagnostic company; Orion, a diagnostic
and pharmaceutical company in Finland; Osteometer, a diagnostic company in
Denmark; Hybritech, a division of Beckman Instruments, a diagnostic company that
in 1996 received 510(k) clearance from the FDA to market its test for bone
specific alkaline phosphatase; and Ostex International, Inc., a diagnostic
company that in 1995 received 510(k) clearance from the FDA to market an
immunoassay for bone resorption. In addition, the Company will compete with
companies that measure the same biochemical markers as Metra using different
testing methods. The most established of these are companies manufacturing high
pressure liquid chromatography (HPLC) assays, including Quest Diagnostics and
Bio-Rad Laboratories. The Company believes that although the HPLC method for
measuring pyridinium crosslinks is extremely accurate, it is primarily a
research tool and is unsuitable for routine clinical use because it has low
throughput, is expensive and labor intensive, and requires skilled technicians.
There can be no assurance, however, that competitors have not developed, or are
not developing, less expensive, more clinically useful HPLC products. In
addition, as the Company
 
                                       13
<PAGE>
licenses its technology to diagnostic companies for use in alternative formats,
tests sold by these licensees will compete with the Company's products.
 
    Certain diseases and disorders targeted by the Company's products can also
be diagnosed and monitored using existing imaging technologies, such as DXA.
Although DXA may be considered more expensive and less convenient than tests for
biochemical markers, there can be no assurance that competitors have not
developed, or are not developing, less expensive, more clinically convenient
imaging devices. The Company believes that, at least in their present forms,
current imaging systems and tests for biochemical markers are complementary
because one of Metra's tests can identify a patient's rate of bone resorption,
as compared to imaging analysis, which measures a patient's existing bone
density.
 
    The market for the Company's ultrasound product under development is
expected to be highly competitive and subject to rapid technological change and
evolving industry requirements and standards. The Company believes that these
trends will continue into the foreseeable future. The Company's ultrasound-based
diagnostic product currently under development could experience competition from
companies with DXA products, companies with biochemical markers, and makers of
ultrasound systems. Several companies, including Aloka Company Ltd., Hitachi
Instruments, Inc., Hologic, Inc., Lunar Corporation, Norland Medical Systems,
and Osteometer MediTech AS have developed systems to measure bone density which
may compete with the Company's ultrasound product under development. The Company
believes that competition in the field of bone densitometry is based upon price,
precision, speed of measurement, patient radiation dose, size, ease of
operation, product versatility, product reliability and quality of service.
There can be no assurance that the Company's product, if commercialized, will
compete effectively with respect to these criteria.
 
    Several companies, including Hologic, Inc., IGEA S.r.l., McCue PLC, Lunar
Corporation, Myriad Ultrasound Systems, Ltd., and Osteometer MediTech AS, have
developed ultrasound systems to assess bone fragility. The Company believes that
competition in the field of ultrasound systems is based on price, precision,
speed of measurement, size and ease of operation, product reliability and
quality of service. No ultrasound bone analyzer has been approved for commercial
sale in the United States although in August 1997, Hologic received a
recommendation for approval by an FDA advisory committee for its ultrasound
product, Sahara. When and if the Company's competitors obtain FDA clearance or
approval for ultrasound bone analyzers in the United States before the Company,
it could have a material adverse effect on the Company's ability to introduce
its ultrasound device (if developed), which in turn could have a material
adverse effect on the Company's business, financial condition and results of
operations.
 
    In addition, other companies have developed ultrasound technology for uses
unrelated to measurement of bone characteristics. There can be no assurance that
such companies will not successfully adapt their technology to the bone field,
and obtain significant market share. The entry of such companies into the market
for the Company's ultrasound product under development could have a material
adverse effect on its business, financial condition and results of operations.
 
    Many of the Company's competitors have substantially greater financial,
technical and human resources than the Company. In addition, many of these
competitors have substantially greater experience than the Company in research
and development, undertaking clinical trials, obtaining regulatory approvals and
third-party reimbursement and manufacturing, marketing and selling diagnostic
products. Smaller companies may also prove to be significant competitors,
particularly through collaborative arrangements with larger companies.
Furthermore, academic institutions, governmental agencies, and other public and
private research organizations conduct research, seek patent protection and
establish collaborative arrangements for product development and marketing and
therefore could become significant competitors.
 
    A number of diagnostic tests and procedures for measuring bone metabolism
and other connective tissue diseases and disorders currently exist and others
are in development by other companies. These products, as well as products that
may be developed in the future, may be available for sale prior to the
 
                                       14
<PAGE>
Company's products, or at a lower cost, or with better technical
characteristics, rendering the Company's products less competitive or obsolete.
In addition, as the Company licenses its technology to diagnostic companies for
use in alternative formats, tests sold by these licensees will compete with the
Company's products. Any product that the Company succeeds in developing and for
which it gains regulatory approval must then compete for market acceptance and
market share. There can be no assurance that competitors' products will not be
found more competitive, either for general use or in specific applications such
as patients with particular medical conditions, or those who are receiving
certain therapies. The Company believes that for all of its immunoassay products
important competitive factors include the relative speed with which companies
can develop products, establish clinical utility, complete the clinical testing
and regulatory approval processes, obtain reimbursement and supply commercial
quantities of the product to the market. The Company's inability to compete
favorably with respect to any of these factors could have a material adverse
effect on its business, financial condition and results of operations.
 
PATENTS, PROPRIETARY RIGHTS AND RELATED LITIGATION RISKS
 
    The Company's success will depend in part on its ability to obtain patent
protection for its products and processes, to preserve its trade secrets and to
operate without infringing the proprietary rights of third parties. The Company
owns five United States patents for biochemical tests, two United States patents
for ultrasound, six pending United States patent applications, and corresponding
foreign patent applications, all in the area of biomedical diagnostics. The
Company is the exclusive licensee from The Rowett Research Institute in Scotland
of patents and patent applications directed to certain diagnostic methods of
detecting metabolic bone disorders, including a United States patent, four
pending United States patent applications, two European Patent Office patents, a
related Australian patent, a related Canadian patent and ten related foreign
patent applications. The Company pays The Rowett Research Institute royalties
upon sales of the Company's Pyrilinks products.
 
    The Company's ability to protect its proprietary position is in part
dependent on the issuance of patents on current and future applications. The
Company currently has applications pending in the United States, Europe, Japan,
Canada and Australia. The validity and breadth of claims covered in medical
technology patents involve complex legal and factual questions, and therefore,
are highly uncertain. Not all patent applications covering the technology
underlying the Company's products have been issued to date and no assurance can
be given that such and other pending patent applications or any future patent
applications will be issued, that the scope of any patent protection will
exclude competitors or provide competitive advantages to the Company, that any
of the Company's patents will be held valid if subsequently challenged or that
others will not claim rights in or ownership to the patents and other
proprietary rights held by the Company. The failure of the Company to obtain
issuances of patents that cover the technology underlying the Company's products
or any other outstanding patent applications, could have a material adverse
effect on the Company's business, financial condition and results of operations.
Furthermore, there can be no assurance that others have not developed or will
not develop similar products, duplicate any of the Company's products or design
around the Company's patents. In addition, others may hold or receive patents or
file patent applications that contain claims having a scope that covers products
developed by the Company. In the event that any relevant claims of third-party
patents are upheld as valid and enforceable, the Company could be prevented from
practicing the subject matter claimed in such patents or could be required to
obtain licenses from the patent owners of each of such patents or to redesign
its products or processes to avoid infringement. There can be no assurance that
such licenses would be available or, if available, would be on terms acceptable
to the Company or that the Company would be successful in any attempt to
redesign its products or processes to avoid infringement. The Company also
relies upon unpatented trade secrets to protect its proprietary technology, and
no assurance can be given that others will not independently develop or
otherwise acquire substantially equivalent techniques or otherwise gain access
to the Company's proprietary technology or that the Company can ultimately
protect meaningful rights to such unpatented proprietary technology.
 
                                       15
<PAGE>
    There has been substantial litigation regarding patent and other
intellectual property rights in the medical device industry, and although the
Company is not currently engaged in litigation regarding intellectual property
matters, from time to time the Company sends and receives communications to and
from third parties regarding such matters. Litigation, which would result in
substantial cost to and diversion of effort by the Company, may be necessary to
enforce patents issued to the Company, to protect trade secrets or know-how
owned by the Company, to defend the Company against claimed infringement of the
rights of others or to determine the ownership, scope or validity of the
proprietary rights of the Company and others. An adverse determination in any
such litigation could subject the Company to significant liability to third
parties, could require the Company to seek licenses from third parties, which
licenses may not be available or, if available, may not be on terms acceptable
to the Company, and ultimately could prevent the Company from manufacturing,
selling or using its products, any of which could have a material adverse effect
on the Company's business, financial condition and results of operations.
 
    Metra also relies on trade secrets and proprietary know-how in its
manufacturing processes. The Company requires each of its employees, consultants
and advisors to execute a confidentiality agreement upon the commencement of any
employment, consulting or advisory relationship with the Company. Each agreement
provides that all confidential information developed or made known to the
individual during the course of the relationship will be kept confidential and
not disclosed to third parties except in specified circumstances. In the case of
employees, the agreements provide that all inventions conceived of by an
individual shall be the exclusive property of the Company, other than inventions
unrelated to the Company and developed entirely on the employee's own time.
There can be no assurance, however, that these agreements will provide
meaningful protection or adequate remedies for misappropriation of the Company's
trade secrets in the event of unauthorized use or disclosure of such
information.
 
REIMBURSEMENT
 
    The Company's ability to successfully commercialize its products depends in
part on the availability of, and the Company's ability to obtain, adequate
levels of third-party reimbursement for use of its diagnostic tests. Although
the Company's products are available for clinical use in many European
countries, reimbursement is currently available in only certain of those
countries.
 
    In the United States, the Company has received FDA clearance for Alkphase-B,
Pyrilinks and Pyrilinks-D. Reimbursement for the Company's FDA cleared tests is
in part determined by CPT codes and may vary by state. Reimbursement under a
specific CPT code is available for Alkphase-B and as of January 1997, for both
Pyrilinks and Pyrilinks-D. In the United States, the cost of medical care is
funded, in substantial part, by government insurance programs, such as Medicare
and Medicaid, and private and corporate health insurance plans. The Company's
ability to commercialize its products successfully will depend in part on the
extent to which appropriate reimbursement levels for the cost of such products
and related treatment are obtained from government authorities, private health
insurers and other organizations, such as health maintenance and organizations
("HMOs"). In certain states, reimbursement levels have been established which
the Company believes are favorable to continued market acceptance for Pyrilinks
and Pyrilinks-D. The trend towards managed health care in the United States and
the concurrent growth of organizations such as HMOs, which could control or
significantly influence the purchase of health care services and products, as
well as legislative proposals to reform health care or reduce government
insurance programs, may all result in lower prices for the Company's products.
The cost containment measures that health care providers are instituting and the
impact of any health care reform could have an adverse effect on the Company's
ability to sell its products and may have a material adverse effect on the
Company's business, financial condition and results of operations.
 
    There can be no assurance that reimbursement in the United States or foreign
countries will be available for any of the Company's products, or if available,
will not be decreased in the future, or that reimbursement amounts will not
reduce the demand for, or the price of, the Company's products. The
 
                                       16
<PAGE>
unavailability of third-party reimbursement or the inadequacy of the
reimbursement for medical procedures using the Company's tests could have a
material adverse effect on the Company's business, financial condition and
results of operations. Moreover, the Company is unable to forecast what
additional legislation or regulation, if any, relating to the health care
industry or third-party coverage and reimbursement may be enacted in the future
or what effect such legislation or regulation would have on the Company's
business.
 
GOVERNMENT REGULATION
 
    The manufacturing, testing, labeling, distribution, marketing, advertising
and promotion of the Company's products are subject to extensive and rigorous
regulation by the FDA and, to varying degrees of regulation, by state and
foreign regulatory agencies. The Company's products are regulated by the FDA
under the Federal Food, Drug and Cosmetic Act (the "Act"), as amended by the
Medical Device Amendments of 1976 and the Safe Medical Devices Act of 1990,
among other laws. Under the Act, the FDA regulates the clinical testing,
manufacturing, labeling, distribution, sale, advertising and promotion of
medical devices in the United States. In addition, various foreign countries in
which the Company's products are or may be sold, including, Germany, France,
Japan and Canada, impose local regulatory requirements. The testing for,
preparation of and subsequent FDA and foreign regulatory review of required
applications is expensive, lengthy and uncertain. Failure to comply with FDA and
similar foreign requirements could result in civil monetary penalties or
criminal sanctions, restrictions on or injunction against marketing of the
Company's products, as well as seizure or recall of the Company's products, or
other regulatory action. There can be no assurance the Company will obtain
necessary regulatory approvals or clearances on a timely basis or at all, and
delays in receipt of or failure to receive such approvals or clearances, the
loss or limitation of previously received approvals or clearances, adoption of
future regulations which may further restrict the production or sales of the
Company's products, or failure to comply with existing or future regulatory
requirements would have a material adverse effect on the Company's business,
financial condition and results of operations.
 
    The Act, among other things, classifies medical devices into three
categories over which the FDA maintains increasing levels of regulation: Class I
(general controls), II (special controls) and III (premarket approval). Although
most devices new to the marketplace after May 1976 are automatically classified
as Class III, the Company believes that many of Metra's products should be
classified as Class I or II devices and hence, not subject to the requirement of
premarket approval by the FDA. Prior to marketing any of these devices, the
Company is required to submit a 510(k) premarket notification to the FDA and
await the FDA's determination that the product may be marketed. In any 510(k)
premarket notification the Company must, among other things, demonstrate the
product to be marketed is substantially equivalent in performance, formula,
design and intended use to a legally marketed Class I or Class II predicate
device or to a Class III device for which the FDA has not required premarket
approval. Test data from clinical trials may be required to demonstrate
substantial equivalence and that the products are safe and effective, which may
delay the 510(k) premarket notification review period.
 
    Following submission of a 510(k) premarket notification, a company may not
market the device for clinical use until an order is issued by the FDA finding
the product to be substantially equivalent. The FDA has no specific time limit
by which it must respond to a 510(k) premarket notification. The FDA may agree
that the product is substantially equivalent to a predicate device and allow the
product to be marketed in the United States. The FDA, however, may (i) determine
that the new device is not substantially equivalent and require a premarket
approval application ("PMA"), or (ii) require further information, such as
additional test data, including data from clinical studies, before it is able to
make a determination regarding substantial equivalence. By requesting additional
information the FDA can further delay market introduction of a Company's
products.
 
    In August 1995, Metra received FDA clearance of its 510(k) premarket
notification for Alkphase-B for use as an aid in the management of patients
diagnosed with Paget's disease. In November 1995, Metra
 
                                       17
<PAGE>
received FDA clearance of its 510(k) premarket notification for Pyrilinks as a
measure of type I collagen degradation, especially bone collagen. In December
1995, Metra received FDA clearance of its 510(k) premarket notification for
Pyrilinks-D as a measure of bone resorption.
 
    There can be no assurance that the FDA will act favorably or quickly in its
review of the Company's future 510(k) submissions, if any, and significant
difficulties and costs may be encountered by the Company in its efforts to
obtain FDA clearance that could delay or preclude the Company from selling its
products in the United States. Furthermore, there can be no assurance that the
FDA will not request additional data, require that the Company conduct further
clinical studies or require a PMA, causing the Company to incur further cost and
delay. In addition, there can be no assurance that the FDA will not limit the
intended use of the Company's products as a condition of 510(k) clearance or PMA
approval. Further, if a company wishes to propose modifications to a product
after FDA clearance of a 510(k) premarket notification or approval of a PMA,
including changes in indications or other significant modifications to labeling
or manufacturing, additional clearances or approvals will be required from the
FDA. Failure to receive or delays in receipt of FDA clearances or approvals,
including the need for extensive clinical trials or additional data as a
prerequisite to approval, or any FDA limitations on the intended use of the
Company's products, could have a material adverse effect on the Company's
business, financial condition and results of operations.
 
    If the FDA indicates that a PMA is required for any of the Company's
products, the application will require the results of extensive clinical
studies, manufacturing information and likely review by a panel of medical
experts outside the FDA. Clinical studies would need to be conducted in
accordance with FDA requirements. Failure to comply with FDA requirements could
result in the FDA's refusal to accept the data or the imposition of regulatory
sanctions. FDA review of a PMA application can take significantly longer than
that for a 510(k) premarket notification. There can be no assurance that the
Company will be able to meet the FDA's PMA requirements or that any necessary
approvals will be received. Failure to obtain necessary regulatory approvals,
the restriction, suspension or revocation of regulatory approvals, if obtained,
or any other failure to comply with regulatory requirements could have a
material adverse effect on the Company's business, financial condition and
results of operations.
 
    The Act and California laws also require the Company to be licensed and to
manufacture its products in compliance with current good manufacturing practices
("GMP") regulations. These regulations require that the Company manufacture its
products and maintain related documentation in a prescribed manner with respect
to manufacturing, testing and control activities. The Company is also required
to comply with various FDA requirements for labeling and marketing, and the FDA
prohibits a device, whether or not cleared under a 510(k) premarket notification
or approved under a PMA, from being marketed for unapproved clinical uses. If
the FDA believes that a company is not in compliance with the regulations, it
can institute proceedings to detain or seize a product, issue a recall, prohibit
marketing and sale of the company's products and assess civil and criminal
penalties against the company, its officers or its employees. There can be no
assurance that Metra will receive marketing clearance or approval for any of its
future products or that its manufacturing facility will satisfy GMP or
California manufacturing requirements. The Company's facilities and
manufacturing processes have been periodically inspected by the State of
California and other agencies, but remain subject to audit from time to time.
The Company believes that it is in substantial compliance with all applicable
federal and state regulations. Nevertheless, there can be no assurance that the
FDA or a state agency will agree with the Company's position, or that its GMP
compliance will not be challenged at some subsequent point in time. Enforcement
of the GMP regulations has increased significantly in the last several years and
the FDA has publicly stated that compliance will be more strictly scrutinized.
In the event that the Company is determined to be in noncompliance with FDA
regulations, to the extent that the Company is unable to convince the FDA or
state agency of the adequacy of its compliance, the FDA or state agency has the
power to assert penalties or remedies, including injunction or temporary
suspension of shipment until compliance is achieved. Noncompliance may also lead
to a recall of product. Such penalties or remedies could have a materially
 
                                       18
<PAGE>
adverse effect on the Company's business, financial condition and results of
operations. In addition, the manufacture, sale or use of the Company's products
are also subject to regulation by other federal entities, such as the
Occupational Safety and Health Agency and the Environmental Protection Agency,
and by various state agencies, including the California Environmental Protection
Agency. Federal and state regulations regarding the manufacture, sale or use of
the Company's products are subject to future change, which changes could have a
material adverse effect on the Company's business, financial condition and
results of operations.
 
    Distribution of the Company's products outside the United States may be
subject to FDA export and extensive foreign government regulation. These
regulations, including the requirements for approvals or clearance to market,
the time required for regulatory review and the sanctions imposed for
violations, vary from country to country. There can be no assurance that the
Company will obtain regulatory approvals in such countries or that it will not
be required to incur significant costs in obtaining or maintaining its foreign
regulatory approvals. In addition, the export by the Company of certain of its
products which have not yet been cleared for domestic commercial distribution
may be subject to FDA export restrictions. Failure to obtain necessary
regulatory approvals, the restriction, suspension or revocation of existing
approvals or any other failure to comply with regulatory requirements outside
the United States could have a material adverse effect on the Company's
business, financial condition and results of operations.
 
    Many of Metra's customers using its diagnostic devices for clinical use in
the United States may also be regulated under the Clinical Laboratory
Improvement Amendments of 1988 ("CLIA"). CLIA is intended to ensure the quality
and reliability of all medical testing in laboratories in the U.S. by requiring
that any health care facility in which testing is performed meet specified
standards in the areas of personnel qualification, administration, participation
in proficiency testing, patient test management, quality control, quality
assurance and inspections. The regulations have established three levels of
regulatory control based on test complexity ; "waived," "moderately complex" and
"highly complex". Metra's Alkphase-B test is categorized as a highly complex
test for clinical use in the United States, and the Company believes that its
other tests will also be categorized as highly complex. Laboratories that
perform either moderately or highly complex tests must meet certain standards
with the major difference in requirements being quality control and personnel
standards. Personnel requirements for highly complex tests are more rigorous
than those for moderately complex tests, requiring that personnel have more
education and experience than personnel conducting moderately complex tests.
Under the CLIA regulations, all laboratories performing high or moderately
complex tests are required to obtain either a registration certificate or
certification of accreditation from the Health Care Financial Administration
("HCFA"). As a result of the CLIA requirements, physician office laboratories
and small volume test sites may be dissuaded from initiating, continuing or
expanding patient testing, particularly if the tests are classified as
moderately or highly complex tests. There can be no assurance that the CLIA
regulations and future administrative interpretations of CLIA will not have an
adverse impact on the potential market for the Company's products.
 
EMPLOYEES
 
    As of June 30, 1997, the Company had 70 full-time employees, 11 of whom were
engaged in, or directly supported, the Company's research and development
activities, 26 of whom were in sales and marketing, 23 of whom were in
manufacturing operations, and 10 of whom were in administration. The Company
also employs several part-time employees and uses outside consultants. The
Company considers relations with its employees to be good. None of the Company's
employees is covered by a collective bargaining agreement.
 
                                       19
<PAGE>
EXECUTIVE OFFICERS OF THE COMPANY
 
    The following table sets forth certain information with respect to the
executive officers and certain other officers of the Company as of June 30,
1997:
 
<TABLE>
<CAPTION>
NAME                                          AGE                        POSITION
- ----------------------------------------      ---      ---------------------------------------------
<S>                                       <C>          <C>
George W. Dunbar, Jr....................          50   President, Chief Executive Officer and
                                                         Director
 
Ronald T. Steckel.......................          44   Senior Vice President
 
Gerald J. Allen, Ph.D...................          46   Vice President, Research and Development
 
Kurt E. Amundson........................          44   Vice President and Chief Financial Officer
 
John F. Coombes.........................          53   Vice President, Sales & Marketing
 
Debby R. Dean...........................          41   Vice President, Human Resources and
                                                         Administration
</TABLE>
 
    The officers of the Company are appointed by the Board of Directors and
serve at the discretion of the Board. There are no family relationships among
the directors or officers of the Company.
 
    MR. DUNBAR joined the Company as President, Chief Executive Officer and
Director in July 1991. Prior to joining the Company, he was the Vice President
Licensing and Business Development of The Ares-Serono Group ("Ares-Serono"), a
Swiss health care company that markets pharmaceutical, diagnostic and veterinary
products worldwide, from 1988 until 1991, where he established a licensing and
acquisition group for its health care divisions. From 1974 until 1987, he held
various senior management positions with Amersham International ("Amersham"), a
health care and life sciences company, where he most recently served as Vice
President for its Life Sciences business in North America. Mr. Dunbar also
served as Amersham's General Manager of Pacific Rim markets and Eastern Regional
operations and, prior to that, he managed the international marketing of
Amersham's medical and industrial radioisotopes. Mr. Dunbar also serves as a
director of DepoTech, a public biotechnology company, LJL Biosystems, a life
sciences systems company and Metra Biosystems (U.K.) Ltd., the Company's wholly
owned subsidiary. Mr. Dunbar holds a B.S. in electrical engineering and an
M.B.A. from Auburn University, and sits on the Auburn School of Business M.B.A.
Advisory Committee.
 
    MR. STECKEL joined the Company as Vice President, Development and
Operations, in February 1992. He was promoted to Senior Vice President in August
1996. From 1990 until 1992, he was Vice President of Operations of Leeco
Diagnostics, a medical diagnostics company, where he was responsible for
manufacturing, quality assurance, materials management and facilities. Prior to
his employment at Leeco, Mr. Steckel worked for Ares-Serono from 1986 to 1990,
in various positions including Director, Corporate Projects and Vice President,
Operations of Serono Baker Diagnostics ("Serono"). At Serono, Mr. Steckel
managed the successful launches of immunoassay analyzers and hematology
instruments to the international marketplace. Mr. Steckel holds a B.S. in
biology from Blackburn University and an M.B.A. from Lake Forest College.
 
    DR. ALLEN joined the Company as Vice President Research and Development in
June 1997. Dr. Allen has worked in the commercial immunoassay industry since
1975 with various companies including Amersham International, Serono
Diagnostics, and G.D. Searle. From 1991 to 1997, Dr. Allen was Vice President
Diagnostics at R & D Systems, Inc. in Minneapolis. Dr. Allen received his B.S.
and Ph.D. degrees from The University of Bristol.
 
    MR. AMUNDSON joined the Company as Vice President and Chief Financial
Officer in January 1996. From 1994 until 1996, Mr. Amundson was Vice President
and Chief Financial Officer of Shaman
 
                                       20
<PAGE>
Pharmaceuticals, Inc., a biopharmaceutical company ("Shaman"). Prior to his
employment with Shaman, he was Chief Financial Officer at Abaxis, Inc., a
biomedical instrumentation company. From 1986 to 1991, Mr. Amundson was Vice
President, Finance at Proxim, Inc., a maker of wireless network products. Mr.
Amundson is a Certified Public Accountant and received a B.A. in Graphic
Communications from California Polytechnic University, San Luis Obispo.
 
    MR. COOMBES joined the Company in November 1993 as Director European Sales.
Mr. Coombes was appointed Vice President Sales and Marketing in June 1997 after
serving as Vice President International since August 1996 and previously as
Director--European Operations and Managing Director of Metra Biosystems (U.K)
from November 1994 to August 1996. From 1992 to 1993, Mr. Coombes was European
Sales Manager of T Cell Diagnostics, a division of T Cell Sciences, a
biotechnology company. Prior to his employment at T Cell Diagnostics, Mr.
Coombes established Digen Limited, a distributor for Gene Trak Systems. From
1989 to 1991, Mr. Coombes was Director of European Operations for Gene Trak
Systems, a human diagnostics, food industry and industrial biotechnology
company. Mr. Coombes received an Ordinary National Diploma in chemistry from
Bromsgrove College in Worcestershire, England and Higher National Diplomas in
chemistry and analytical chemistry from Lanchester Polytechnic in Coventry,
England.
 
    MS. DEAN joined the Company as Senior Director of Human Resources and
Administration in September 1995, and was appointed Vice President Human
Resources and Administration July 1997. From 1992 to 1995, Ms. Dean worked at
DNX Corporation, a biopharmaceutical company, in the positions of Vice
President, Corporate Administration & Communications. Prior to DNX, Ms. Dean
worked with Serono, from 1988 to 1992 as Director, Human Resources. Ms. Dean
received a B.S. in Management from Allentown College, and an M.B.A. from Lehigh
University.
 
ITEM 2. PROPERTIES
 
    Metra currently leases approximately 30,600 square feet of laboratory and
office space at two facilities in Mountain View, California. The Company leases
these facilities under operating leases which last through May 2001, each with a
renewal option that, if exercised, would extend the term of the lease through
May 2003. In addition, the Company leases approximately 1,600 square feet of
office space in Lake Oswego, Oregon under an operating lease which lasts until
February 1998. The Company also leases space in England, Italy and Germany under
operating leases which expire at various times. The Company believes that its
existing facilities will be sufficient for its operational purposes through
1998.
 
ITEM 3. LEGAL PROCEEDINGS
 
    None.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
    Not Applicable.
 
                                       21
<PAGE>
                                    PART II
 
ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS
 
    The Company's Common Stock is traded on the Nasdaq National Market under the
symbol MTRA. The range of reported high and low bid quotations for the shares of
the Company's Common Stock, as reported by the Nasdaq National Market, are set
forth below for the periods indicated:
 
<TABLE>
<CAPTION>
 FISCAL 1997      HIGH        LOW      FISCAL 1996      HIGH        LOW
- --------------  ---------  ---------  --------------  ---------  ---------
<S>             <C>        <C>        <C>             <C>        <C>
1st Quarter...  $    7.25  $    4.50     1st Quarter  $   21.75  $   12.38
 
2nd Quarter...  $    6.00  $    3.75     2nd Quarter  $   21.88  $   16.75
 
3rd Quarter...  $    6.75  $    3.75     3rd Quarter  $   18.25  $   13.50
 
4th Quarter...  $    5.00  $    2.63     4th Quarter  $   14.50  $    4.50
</TABLE>
 
    The above quotations represent prices quoted between dealers, do not include
retail markup, markdown or commissions and may not represent actual
transactions. On September 15, 1997, the closing price of the Company's Common
Stock was $3.75.
 
    HOLDERS
 
    As of September 15, 1997 the Company had approximately 141 shareholders of
record, including several holders who are nominees for an undetermined number of
beneficial owners.
 
    DIVIDENDS
 
    The Company has never declared or paid any cash dividends or made any other
cash distribution on its Common Stock, and the Company anticipates that in the
foreseeable future it will follow a policy of retaining any earnings for use in
its business. Any future determination as to declaration and payment of
dividends will be made at the discretion of the Board of Directors.
 
ITEM 6. SELECTED CONSOLIDATED FINANCIAL DATA
 
    The following selected financial data are derived from consolidated
financial statements of Metra Biosystems, Inc. The consolidated balance sheet as
of June 30, 1997 and the related consolidated statements of operations,
shareholders' equity, and cash flows for the year ended June 30, 1997 have been
audited by Ernst & Young LLP, independent auditors. The consolidated balance
sheets ended June 30, 1996, 1995, 1994 and 1993 and the related consolidated
statements of operations, shareholders' equity, and cash flows for each of the
years in the four-year period ended June 30, 1996 have been audited by other
 
                                       22
<PAGE>
independent auditors. The data should be read in conjunction with the
consolidated financial statements, related notes, and other financial
information included herein.
 
<TABLE>
<CAPTION>
                                                            1997        1996        1995        1994       1993
                                                         ----------  ----------  ----------  ----------  ---------
<S>                                                      <C>         <C>         <C>         <C>         <C>
                                                                 (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
CONSOLIDATED STATEMENT OF OPERATIONS DATA:
Product sales..........................................  $    6,405  $    4,413  $    2,552  $    1,439  $     617
Partner revenue........................................         320       2,057         744       2,032      2,062
                                                         ----------  ----------  ----------  ----------  ---------
Total revenues.........................................       6,725       6,470       3,296       3,471      2,679
Total operating expenses(1)............................      22,035      29,670      10,436       7,211      6,349
Net loss(1)............................................  $  (13,127) $  (21,399) $   (6,803) $   (3,575) $  (3,583)
Net loss per share.....................................  $    (1.04) $    (2.04) $    (1.08) $    (0.69) $   (0.87)
Shares used to compute net loss per share..............      12,610      10,515       6,303       5,156      4,119
 
CONSOLIDATED BALANCE SHEET DATA:
Working capital........................................  $   30,729  $   44,231  $    2,759  $    9,803  $   2,749
Total assets...........................................      47,768      60,193       7,400      12,807      4,431
Long-term portion of capital lease obligations.........       1,574       1,367          40          93        293
Redeemable preferred stock.............................      --          --          23,260      23,260     11,616
Total shareholders' equity (deficit)...................      42,077      54,424     (17,856)    (11,650)    (8,092)
</TABLE>
 
- ------------------------
 
(1) The fiscal 1996 total operating expenses and net loss include $11,291 of
    acquired in-process research and development associated with the acquisition
    of Osteo Sciences Corporation in January, 1996.
 
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS
 
OVERVIEW
 
    Since its commencement of operations in March 1990, Metra has been engaged
in the development and commercialization of diagnostic products for the
detection and management of metabolic bone diseases and disorders. The Company
has developed and is currently marketing for research and clinical use four
immunodiagnostic tests to assess bone resorption and formation and one
immunodiagnostic test to assess bone growth disorders. In the United States,
three of these tests have received 510(k) clearance from the FDA for clinical
use and two of these tests are being marketed for research use only. The Company
is currently marketing its products for clinical as well as research use on a
world-wide basis.
 
    The Company's principal sources of revenue are product sales and partner
revenues. Product sales are principally derived from sales of the Company's
biochemical tests for research and clinical use. Partner revenues result from
certain collaborative relationships and primarily consist of milestone payments
and licensing fees received from these partners and revenues from sales to these
partners of proprietary reagents for use with the test formats of these
partners.
 
    The Company's revenues from product sales have historically resulted from
worldwide sales for clinical and research use. In November and December of 1995,
the Company received 510(k) clearance from the FDA for its Pyrilinks and
Pyrilinks-D products. Revenues from clinical sales in the United States will be
dependent, in part, upon the rate at which the Company can increase awareness
and acceptance of its products among clinicians. The Company commenced its
marketing efforts in the United States upon receiving 510(k) clearance, and does
not anticipate significant revenues from clinical sales of its products in the
United States unless and until the results of its marketing efforts are realized
and overall consumer awareness of management of bone and joint health increases.
There can be no assurance that the Company can successfully increase market
awareness or acceptance of the Company's products in a timely manner or at all,
and failure to do so would have a material adverse effect on the Company's
business,
 
                                       23
<PAGE>
financial condition and results of operations. Due to seasonal factors such as
customer and distributor vacations, the Company expects reduced product sales
during the summer months, particularly in Europe. As a result of this seasonal
effect, the Company's revenues could be lower in the quarter ending September 30
than in the other quarters.
 
    In April 1997, the Company entered into a Co-Promotion Agreement with Berlex
Laboratories, Inc. ("Berlex") which includes the utilization of the direct
detail pharmaceutical force of Berlex. Over the first year of the promotional
agreement, which begins July 1, 1997, the Company will pay Berlex approximately
$3,000,000 for promotional activities, record an expense for the fair value of
warrants issued to Berlex of approximately $506,000, and pay commissions on
increased sales of the Company's Pyrilinks-D product. After the first
promotional year, the future continuance of the promotional agreement and the
associated financial cost to Metra is, in part, dependent upon the achievement
of certain milestones and the mutual consent of both parties.
 
    Historically, the Company's quarterly revenues have fluctuated
significantly. Partner revenues have fluctuated primarily as a result of the
timing of milestone payments received from corporate collaborations. Product
sales have fluctuated primarily as a result of the introduction of new products,
seasonal variations in demand, the rate of acceptance of the Company's products
and variations in the timing and volume of distributor purchases. The Company
expects that total revenues will fluctuate as a result of these and other
factors and that international sales will continue to account for a significant
portion of its revenues in the future. The Company expects to incur increased
costs related to sales and marketing, clinical studies, manufacturing, research
and development and general and administrative expenses. As a result, the
Company expects its results from operations will vary significantly from quarter
to quarter and from year to year and will depend on, among other things, gaining
regulatory clearances in the United States and elsewhere, the rate of acceptance
of the Company's products in the marketplace, the availability of reimbursement,
the timing of fees and milestone payments from its partners in collaborative
relationships, the execution of new collaborative relationships, costs
associated with the development of the Company's products and costs associated
with and the financial impact of acquisitions.
 
    The Company's gross margin is affected by a number of factors, including
product mix, product pricing, the extent of diagnostic test sales compared to
reagent sales and royalty revenue, the percentage of direct sales compared to
distributor sales and manufacturing costs, including overhead and material
costs.
 
RESULTS OF OPERATIONS
 
    FISCAL YEARS ENDED JUNE 30, 1997 AND 1996
 
    Product sales for the year ended June 30, 1997 increased to $6,405,000 from
$4,413,000 for the year ended June 30, 1996. The increase in product sales was
due to increasing volume from broader adoption of the Company's biochemical
tests for clinical and research use worldwide. The Company's bone resorption
products were cleared for marketing in the U.S. by the FDA in the second fiscal
quarter of 1996. International product sales accounted for 77% and 78% of
product revenues the fiscal years ended June 30, 1997 and 1996, respectively.
The adoption rate in the U.S. (post clearance) has been slower than anticipated
and the Company is focused on increasing marketing efforts for medical
education.
 
    Partner revenues for the fiscal year ended June 30, 1997 decreased to
$320,000 from $2,057,000 for the fiscal year ended June 30, 1996. This decrease
resulted primarily from a decrease in non-recurring milestone payments from
corporate partners, earned upon receipt of FDA clearance of Pyrilinks (November
1995) and Pyrilinks-D (December 1995), which were received in fiscal year 1996.
 
    Cost of product sales for the fiscal year ended June 30, 1997 increased to
$3,982,000 from $3,276,000 for the fiscal year ended June 30, 1996, reflecting
the increased volume of products sold and associated production costs. The gross
margin on product sales for the fiscal year ended June 30, 1997 was 38%,
 
                                       24
<PAGE>
compared to 26% for the prior fiscal year. The increase in the gross margin was
due to production volume increases and efficiency gains in the production
process.
 
    Research and development expenses for the fiscal year ended June 30, 1997
increased to $5,670,000 from $4,308,000 for the fiscal year ended June 30, 1996.
This increase resulted from increased internal product development,
collaborative programs, and the on-going research costs of the ultrasound
program which was acquired in January 1996. Until the completion of the
development of the ultrasound system, the Company expects research and
development expenses to approximate current levels.
 
    Sales and marketing expenses for the fiscal year ended June 30, 1997
increased to $8,838,000 from $7,725,000 for the fiscal year ended June 30, 1996.
The increase is due to increased expenses associated with medical education
programs, and sales related spending increases at international locations. The
Company believes that sales and marketing expenses will increase in subsequent
periods due to fees and commissions payable to Berlex in connection with the
Co-Promotion agreement entered into between the Company and Berlex in April
1997.
 
    General and administrative expenses for the fiscal year ended June 30, 1997
increased to $3,545,000 from $3,070,000 for the fiscal year ended June 30, 1996,
due to increased personnel costs as well as additional legal and consulting
expenses necessary to support the Company's expanded operations. The Company
expects future general and administrative expenses to approximate current
levels.
 
    Net interest and other income for the fiscal year ended June 30, 1997
increased to $2,183,000 from $1,801,000 for the fiscal year ended June 30, 1996
primarily as a result of the interest earned on the investment of the proceeds
from the Company's follow-on offering in April 1996.
 
    FISCAL YEARS ENDED JUNE 30, 1996 AND 1995
 
    Product sales for the year ended June 30, 1996 increased to $4,413,000 from
$2,552,000 for the year ended June 30, 1995. The increase in product sales was
due to increasing volume from broader adoption of the Company's biochemical
tests for clinical use internationally and in the United States. The Company's
bone resorption products were cleared for marketing by the FDA in the U.S. in
the second fiscal quarter of 1996. International product sales accounted for 78%
of product revenues for both the fiscal years ended June 30, 1996 and 1995.
 
    Partner revenues for the fiscal year ended June 30, 1996 increased to
$2,057,000 from $744,000 for the fiscal year ended June 30, 1995. This increase
resulted primarily from an increase in non-recurring milestone payments from
corporate partners, earned upon receipt of FDA clearance of Pyrilinks (November
1995) and Pyrilinks-D (December 1995), and to a lesser extent an increase in
reagent sales to collaborative partners.
 
    Cost of product sales for the fiscal year ended June 30, 1996 increased to
$3,276,000 from $1,987,000 for the fiscal year ended June 30, 1995, reflecting
the increased volume of products sold and associated production costs.
 
    Research and development expenses for the fiscal year ended June 30, 1996
increased to $4,308,000 from $3,717,000 for the fiscal year ended June 30, 1995.
This increase resulted from increased product development and collaborative
programs and the on-going research costs of the ultrasound program which was
acquired in January 1996.
 
    Sales and marketing expenses for the fiscal year ended June 30, 1996
increased to $7,725,000 from $2,881,000 for the fiscal year ended June 30, 1995.
The increase is due to increased staffing in domestic and international
locations, the costs of additional marketing programs which were implemented to
support the clinical launch of the Company's products in the United States
following the clearance by the FDA, and the addition of a direct sales force in
the United States.
 
                                       25
<PAGE>
    General and administrative expenses for the fiscal year ended June 30, 1996
increased to $3,070,000 from $1,851,000 for the fiscal year ended June 30, 1995,
due to increased personnel costs and additional expenses associated with being a
public company for all of fiscal 1996.
 
    Acquired in-process research and development costs for the fiscal year ended
June 30, 1996 resulted from a one-time charge of $11,291,000. This charge was
primarily composed of the purchase price of approximately $10,017,000, with the
balance related to costs and expenses associated with the acquisition, the fair
value of liabilities assumed including reserves for future costs related to the
acquisition, less the fair value of tangible assets acquired. The value of the
research and development acquired from Osteo Sciences was determined based upon
an analysis of the present value of expected future cash flows related to the
technology. At the date of acquisition, technical feasibility of the acquired
technology had not yet been established and the technology had no foreseeable
future alternative uses. The Company expects product development of the
ultrasound system to be completed in calendar 1998. However, due to the inherent
uncertainty of the development process and of obtaining approval to market the
proposed products from the FDA and comparable regulatory bodies internationally,
the Company cannot precisely predict the timing of completion or the total
expenditures necessary to complete product development.
 
    Net interest and other income for the fiscal year ended June 30, 1996
increased to $1,801,000 from $337,000 for the fiscal year ended June 30, 1995
primarily as a result of the interest earned on the investment of the proceeds
from the Company's initial public offering in July, 1995 and the Company's
follow-on offering in April, 1996.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    The Company has financed its operations from inception primarily through the
sale of preferred and common stock, payments received under to collaborative
research and development agreements, sales of the Company's diagnostic products
for research and clinical use and, to a lesser extent, through equipment
financing. In July 1995, the Company completed its initial public offering of
3,450,000 shares of common stock. All preferred stock was automatically
converted into shares of common stock upon closing of the offering. The cash
proceeds from the initial public offering, net of underwriters discounts were
$32,085,000. Total additional expenses associated with the offering were
$727,000, resulting in net proceeds from the offering of $31,358,000. In April,
1996, the Company had a follow-on offering of 2,300,000 shares of Common Stock.
The cash proceeds from the Company's follow-on offering completed April 22,
1996, net of underwriters' discounts were $29,187,000. Total additional expenses
associated with the follow-on offering were $450,000, resulting in net proceeds
to the Company from the follow-on offering of $28,737,000.
 
    As of June 30, 1997, the Company had cash and investments of $39,140,000.
During the fiscal year ended June 30, 1997 the Company's use of cash in
operating activities was $12,516,000 compared to $10,730,000 for the fiscal year
ended June 30, 1996. The increase in cash used in operating activities was
primarily due to the increased net loss (excluding the write-off of in-process
research in development in fiscal 1996 as a result of the acquisition of Osteo
Science Corporation for consideration which primarily consisted of stock).
 
    The Company has historically utilized leasing arrangements to finance
capital purchases. As of June 30, 1997, $2,140,000 was outstanding in
conjunction with these leases. The leases are classified as capital leases and
expire in fiscal years 2000 and 2001. The Company's leasing agreements include
negative covenants which require an irrevocable letter of credit in the event of
non-compliance of the covenants.
 
    The Company's future capital requirements depend upon, among other things,
the costs of research and development programs, the funding of clinical and
regulatory related studies, the expansion of marketing and selling activities,
costs involved in filing, prosecuting and enforcing patent claims, and the time
and costs associated with obtaining regulatory approvals for future products.
Funds may also be used for investments in, or acquisitions of, complementary
businesses, products or technologies; in expanding
 
                                       26
<PAGE>
the Company's manufacturing capacity; or in improving its existing facilities.
Although the Company believes that its current cash, cash equivalents and
investment securities will be sufficient to meet the Company's operating
expenses and capital requirements through at least fiscal 1999, the Company's
future liquidity and capital requirements will depend on numerous factors,
including regulatory actions by the FDA and other international regulatory
bodies, market acceptance of its products, expansion of the Company's marketing
and sales activities, the cost of intellectual property protection and the costs
associated with any company or product acquisitions . The Company may, however,
seek additional equity or debt financing to fund further expansion of its
operations, other projects or acquisitions. The timing and amount of such
capital requirements cannot be precisely determined at this time and will depend
on a number of factors, including demand for the Company's products, product mix
changes, industry conditions and competitive factors. There can be no assurance
that if it becomes necessary to raise additional capital, that such capital will
be available on acceptable terms, if at all.
 
                                       27
<PAGE>
ITEM 8. FINANCIAL STATEMENTS
 
                 REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
 
The Board of Directors and Shareholders
Metra Biosystems, Inc.
 
    We have audited the accompanying consolidated balance sheet of Metra
Biosystems, Inc. as of June 30, 1997, and the related consolidated statements of
operations, shareholders' equity, and cash flows for the year then ended. Our
audit also included the financial statement schedule for the year ended June 30,
1997 listed in the index at Item 14(a)(2). The consolidated financial statements
and schedule of the Company as of June 30, 1996 and for the two years then
ended, were audited by other auditors whose report dated July 18, 1996,
expressed an unqualified opinion on those statements and schedule. These
financial statements and schedule are the responsibility of the Company's
management. Our responsibility is to express an opinion on these financial
statements and schedule based on our audit.
 
    We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.
 
    In our opinion, the 1997 consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Metra
Biosystems, Inc. as of June 30, 1997, and the results of its operations and its
cash flows for the year then ended, in conformity with generally accepted
accounting principles. Also, in our opinion, the related financial statement
schedule, when considered in relation to the basic financial statements taken as
a whole, presents fairly in all material respects the information set forth
therein for the year ended June 30, 1997.
 
                                          ERNST & YOUNG LLP
 
Palo Alto, California
July 16, 1997
 
                                       28
<PAGE>
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors and Shareholders
Metra Biosystems, Inc.
 
    We have audited the accompanying consolidated balance sheet of Metra
Biosystems, Inc. and subsidiaries (the Company) as of June 30, 1996, and the
related consolidated statements of operations, shareholders' equity, and cash
flows for each of the years in the two-year period ended June 30, 1996. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
    We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
    In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Metra
Biosystems, Inc. and subsidiaries as of June 30, 1996, and the results of their
operations and their cash flows for each of the years in the two-year period
ended June 30, 1996, in conformity with generally accepted accounting
principles.
 
                                          KPMG PEAT MARWICK LLP
 
San Francisco, California
July 18, 1996
 
                                       29
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
                          CONSOLIDATED BALANCE SHEETS
 
                             JUNE 30, 1997 AND 1996
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                                               1997        1996
                                                                                            ----------  ----------
<S>                                                                                         <C>         <C>
                                                      ASSETS
Current assets:
  Cash and cash equivalents...............................................................  $   11,709  $   19,217
  Short-term investments..................................................................      18,876      26,283
  Accounts receivable, net of allowance for doubtful accounts of $147 and $101 at June 30,
    1997 and 1996, respectively...........................................................       1,576       1,266
  Interest receivable.....................................................................         503         578
  Inventories.............................................................................       1,446       1,040
  Prepaid expenses and other current assets...............................................         736         249
                                                                                            ----------  ----------
    Total current assets..................................................................      34,846      48,633
Property and equipment, net...............................................................       4,182       4,314
Long-term investments.....................................................................       8,555       6,747
Other assets..............................................................................         185         499
                                                                                            ----------  ----------
                                                                                            $   47,768  $   60,193
                                                                                            ----------  ----------
                                                                                            ----------  ----------
 
                                       LIABILITIES AND SHAREHOLDERS' EQUITY
 
Current liabilities:
  Accounts payable........................................................................  $    1,068  $    2,185
  Accrued expenses........................................................................       2,483       1,810
  Current portion of capital lease obligations............................................         566         407
                                                                                            ----------  ----------
    Total current liabilities.............................................................       4,117       4,402
Long-term portion of capital lease obligations............................................       1,574       1,367
Commitments and contingencies
Shareholders' equity:
  Preferred stock, $0.001 par value, 5,000,000 shares authorized, no shares issued or
    outstanding...........................................................................      --          --
  Common stock, $0.001 par value, 50,000,000 shares authorized; 12,628,618 and 12,598,768
    shares issued and outstanding at June 30, 1997 and 1996, respectively.................          13          13
  Additional paid-in capital..............................................................      95,219      94,539
  Notes receivable from shareholders......................................................         (40)        (90)
  Deferred compensation...................................................................         (70)        (79)
  Unrealized loss on investments..........................................................         (13)        (83)
  Cumulative translation adjustment.......................................................         (16)         13
  Accumulated deficit.....................................................................     (53,016)    (39,889)
                                                                                            ----------  ----------
    Total shareholders' equity............................................................      42,077      54,424
                                                                                            ----------  ----------
                                                                                            $   47,768  $   60,193
                                                                                            ----------  ----------
                                                                                            ----------  ----------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       30
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
                   YEARS ENDED JUNE 30, 1997, 1996, AND 1995
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                                    1997        1996       1995
                                                                                 ----------  ----------  ---------
<S>                                                                              <C>         <C>         <C>
Revenues:
  Product sales................................................................  $    6,405  $    4,413  $   2,552
  Partner revenue..............................................................         320       2,057        744
                                                                                 ----------  ----------  ---------
    Total revenues.............................................................       6,725       6,470      3,296
                                                                                 ----------  ----------  ---------
Operating expenses:
  Cost of product sales........................................................       3,982       3,276      1,987
  Research and development.....................................................       5,670       4,308      3,717
  Sales and marketing..........................................................       8,838       7,725      2,881
  General and administrative...................................................       3,545       3,070      1,851
  Acquired in-process research and development.................................      --          11,291     --
                                                                                 ----------  ----------  ---------
    Total operating expenses...................................................      22,035      29,670     10,436
                                                                                 ----------  ----------  ---------
  Loss from operations.........................................................     (15,310)    (23,200)    (7,140)
Interest income................................................................       2,430       1,947        367
Interest expense...............................................................        (214)       (106)       (30)
Other expense..................................................................         (33)        (40)    --
                                                                                 ----------  ----------  ---------
    Net loss...................................................................  $  (13,127) $  (21,399) $  (6,803)
                                                                                 ----------  ----------  ---------
                                                                                 ----------  ----------  ---------
Net loss per share.............................................................  $    (1.04) $    (2.04) $   (1.08)
                                                                                 ----------  ----------  ---------
                                                                                 ----------  ----------  ---------
Shares used to compute net loss per share......................................      12,610      10,515      6,303
                                                                                 ----------  ----------  ---------
                                                                                 ----------  ----------  ---------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       31
<PAGE>
                             METRA BIOSYSTEMS, INC.
           CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT)
                   YEARS ENDED JUNE 30, 1997, 1996, AND 1995
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)
<TABLE>
<CAPTION>
                                                                               NOTES
                                             COMMON STOCK      ADDITIONAL    RECEIVABLE
                                          ------------------    PAID-IN         FROM         DEFERRED
                                            SHARES    AMOUNT    CAPITAL     SHAREHOLDERS   COMPENSATION
                                          ----------  ------   ----------   ------------   ------------
<S>                                       <C>         <C>      <C>          <C>            <C>
Balances as of June 30, 1994............     729,510   $  1     $    95        $ (59)         $--
 
Issuance of common stock under stock
  option plan...........................     111,253   --           120         (110)         --
Issuance of common stock under agreement
  for licensed technology...............      33,332   --           200        --             --
Deferred compensation related to
  granting of stock options.............      --       --           575        --              (575)
Amortization of deferred compensation...      --       --         --           --               388
Unrealized loss on investments..........      --       --         --           --             --
Net loss................................      --       --         --           --             --
                                          ----------  ------   ----------      -----          -----
Balances as of June 30, 1995............     874,095      1         990         (169)          (187)
 
Issuance of common stock under employee
  stock option and purchase plans.......      98,927   --           205           79          --
Issuance of common stock related to
  acquisition of Osteo Sciences
  Corporation...........................     541,072      1      10,000        --             --
Conversion of preferred stock into
  common stock..........................   5,324,685      5      23,255        --             --
Conversion of warrants into common
  stock.................................       9,989   --         --           --             --
Issuance of common stock related to
  public offerings......................   5,750,000      6      60,089        --             --
Amortization of deferred compensation...      --       --         --           --               108
Translation adjustment..................      --       --         --           --             --
Unrealized loss on investments..........      --       --         --           --             --
Net loss................................      --       --         --           --             --
                                          ----------  ------   ----------      -----          -----
Balances as of June 30, 1996............  12,598,768     13      94,539          (90)           (79)
 
Issuance of common stock under employee
  stock option and purchase plans.......      46,344   --           157           50          --
Repurchase of common stock..............     (16,494)  --           (20)       --             --
Deferred compensation relating to
  granting of stock options.............      --       --            37        --               (37)
Amortization of deferred compensation...      --       --         --           --                46
Issuance of warrants....................      --       --           506        --             --
Translation adjustment..................      --       --         --           --             --
Unrealized gain on investments..........      --       --         --           --             --
Net loss................................      --       --         --           --             --
                                          ----------  ------   ----------      -----          -----
Balances as of June 30, 1997............  12,628,618   $ 13     $95,219        $ (40)         $ (70)
                                          ----------  ------   ----------      -----          -----
                                          ----------  ------   ----------      -----          -----
 
<CAPTION>
                                                                                         TOTAL
                                          UNREALIZED     CUMULATIVE                  SHAREHOLDERS'
                                            LOSS ON     TRANSLATION    ACCUMULATED      EQUITY
                                          INVESTMENTS    ADJUSTMENT      DEFICIT       (DEFICIT)
                                          -----------   ------------   -----------   -------------
<S>                                       <C>           <C>            <C>           <C>
Balances as of June 30, 1994............    -$-            -$-          $(11,687)      $(11,650)
Issuance of common stock under stock
  option plan...........................    --             --             --                 10
Issuance of common stock under agreement
  for licensed technology...............    --             --             --                200
Deferred compensation related to
  granting of stock options.............    --             --             --             --
Amortization of deferred compensation...    --             --             --                388
Unrealized loss on investments..........       (1)         --             --                 (1)
Net loss................................    --             --             (6,803)        (6,803)
                                            -----          -----       -----------   -------------
Balances as of June 30, 1995............       (1)         --            (18,490)       (17,856)
Issuance of common stock under employee
  stock option and purchase plans.......    --             --             --                284
Issuance of common stock related to
  acquisition of Osteo Sciences
  Corporation...........................    --             --             --             10,001
Conversion of preferred stock into
  common stock..........................    --             --             --             23,260
Conversion of warrants into common
  stock.................................    --             --             --             --
Issuance of common stock related to
  public offerings......................    --             --             --             60,095
Amortization of deferred compensation...    --             --             --                108
Translation adjustment..................    --                13          --                 13
Unrealized loss on investments..........      (82)         --             --                (82)
Net loss................................    --             --            (21,399)       (21,399)
                                            -----          -----       -----------   -------------
Balances as of June 30, 1996............      (83)            13         (39,889)        54,424
Issuance of common stock under employee
  stock option and purchase plans.......    --             --             --                207
Repurchase of common stock..............    --             --             --                (20)
Deferred compensation relating to
  granting of stock options.............    --             --             --             --
Amortization of deferred compensation...    --             --             --                 46
Issuance of warrants....................    --             --             --                506
Translation adjustment..................    --               (29)         --                (29)
Unrealized gain on investments..........       70          --             --                 70
Net loss................................    --             --            (13,127)       (13,127)
                                            -----          -----       -----------   -------------
Balances as of June 30, 1997............     $(13)          $(16)       $(53,016)      $ 42,077
                                            -----          -----       -----------   -------------
                                            -----          -----       -----------   -------------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       32
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
                   YEARS ENDED JUNE 30, 1997, 1996, AND 1995
 
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                     1997        1996       1995
                                                                                  ----------  ----------  ---------
<S>                                                                               <C>         <C>         <C>
Cash flows from operating activities:
  Net loss......................................................................  $  (13,127) $  (21,399) $  (6,803)
  Adjustments to reconcile net loss to net cash used in operating activities:
    Depreciation and amortization...............................................       1,295         610        543
    Compensation expenses paid in stock.........................................          46         108        588
    Forgiveness of notes receivable from officers...............................          37          29         57
    Loss on disposition of property and equipment...............................          52          19         16
    Write-off of in-process research and development............................      --          11,291     --
    Changes in operating assets and liabilities:
      Trade accounts and interest receivable....................................        (235)     (1,284)      (187)
      Inventories...............................................................        (406)       (402)      (267)
      Other current assets and other assets.....................................         265      (1,046)      (777)
      Accounts payable and accrued expenses.....................................        (442)      1,344      1,000
                                                                                  ----------  ----------  ---------
        Net cash used in operating activities...................................     (12,515)    (10,730)    (5,830)
Cash flows from investing activities:
  Purchases of investments......................................................     (28,111)    (46,837)    (1,571)
  Maturities of investments.....................................................      33,780      14,725      2,109
  Purchases of property and equipment, net......................................      (1,215)     (3,048)      (657)
  Proceeds from sale of property and equipment..................................      --          --             15
  Issuance of notes receivable to officers......................................      --          --           (170)
  Repayment of notes receivable from officers...................................          50          79     --
                                                                                  ----------  ----------  ---------
        Net cash provided by (used in) investing activities.....................       4,504     (35,081)      (274)
Cash flows from financing activities:
  Proceeds from capital lease financing.........................................         847       1,922     --
  Repayment of capital lease obligations........................................        (481)       (240)      (201)
  Proceeds from sales of common stock, net......................................         137      61,029        120
                                                                                  ----------  ----------  ---------
        Net cash provided by (used in) financing activities.....................         503      62,711        (81)
                                                                                  ----------  ----------  ---------
Net increase (decrease) in cash and cash equivalents............................      (7,508)     16,900     (6,185)
Cash and cash equivalents at beginning of year..................................      19,217       2,317      8,502
                                                                                  ----------  ----------  ---------
Cash and cash equivalents at end of year........................................  $   11,709  $   19,217  $   2,317
                                                                                  ----------  ----------  ---------
                                                                                  ----------  ----------  ---------
 
Supplemental disclosure of cash flow information:
  Cash paid during the year for interest........................................  $      214  $      106  $      30
 
Supplemental disclosure of noncash investing and financing activities:
  Assets acquired from purchase of Osteo Sciences Corporation...................  $   --      $     (605) $  --
  Liabilities assumed from purchase of Osteo Sciences...........................  $   --      $      686  $  --
  Issuance of warrants under Co-Promotion agreement (Note 10)...................  $      506  $   --      $  --
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       33
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                                 JUNE 30, 1997
 
(1) THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
(a) THE COMPANY
 
    Metra Biosystems, Inc. ("Metra" or the "Company"), a California corporation,
is engaged in the development and commercialization of diagnostic products for
the detection and management of metabolic bone diseases and disorders. The
Company primarily markets its products for clinical and research use in Europe,
the United States and Pacific Rim countries.
 
(b) PRINCIPLES OF CONSOLIDATION
 
    The consolidated financial statements include the accounts of the Company
and its wholly-owned subsidiaries. All significant intercompany balances and
transactions have been eliminated in consolidation. The operations of Osteo
Sciences Corporation are included in the Company's results of operations
beginning February 1, 1996 (see note 14).
 
(c) CASH AND CASH EQUIVALENTS
 
    The Company considers all highly liquid debt instruments purchased with an
original maturity of less than three months to be cash equivalents.
 
(d) INVESTMENTS
 
    The Company accounts for investments in accordance with Statement of
Financial Accounting Standards ("SFAS") No. 115, "Accounting for Certain
Investments in Debt and Equity Securities." The Company's policy is to protect
the value of its investment portfolio and to minimize principal risk by earning
returns based on current interest rates. The Company, by policy, invests
primarily in highly rated debt instruments and limits the amount of investment
with any one issuer. The Company's marketable investments are classified as
available-for-sale as of the balance sheet date and are reported at fair value,
with unrealized gains and losses recorded as a separate component of
shareholders' equity. The cost of securities sold is based on the specific
identification method. Realized gains or losses and declines in value, if any,
judged to be other that temporary on available-for-sale securities are reported
in other income or expense. Fair values of cash and cash equivalents approximate
cost due to the short period of time to maturity. Fair values of long-term and
short-term investments are based on quoted market prices.
 
(e) MAJOR CUSTOMERS AND CONCENTRATIONS OF CREDIT RISK
 
    Financial instruments which potentially expose the Company to a
concentration of credit risk consist primarily of investments and trade accounts
receivable. As of June 30, 1997, no single customer accounted for greater than
10% of accounts receivable. As of June 30, 1996, approximately 14% of recorded
trade receivables were concentrated with one customer. To reduce credit risk,
the Company performs ongoing credit evaluations of its customers' financial
condition. The Company does not generally require collateral on credit sales to
its customers.
 
    The Company earns revenues primarily through product sales to distributors
and through collaborative agreements with partners. Product revenues from one
distributor constituted 15% of total revenues for the year ended June 30, 1997.
Product revenues from one distributor constituted 12% of total revenues for the
year ended June 30, 1996. Product revenues from two distributors constituted 12%
and 11%, respectively, of total revenues for the year ended June 30, 1995. For
the year ended June 30, 1997, no
 
                                       34
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(1) THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
corporate partner constituted greater than 10% of total revenues. Revenues
related to milestone payments from one corporate partner constituted 16% and 13%
of total revenues for the years ended June 30, 1996 and 1995, respectively.
 
(f) INVENTORIES
 
    Inventories are stated at the lower of cost or market, with cost determined
on a first-in, first-out basis.
 
(g) PROPERTY AND EQUIPMENT
 
    Property and equipment are stated at cost. Depreciation is provided using
the straight-line method over the estimated useful lives of the respective
assets, which generally range from three to five years. Assets under capital
leases and leasehold improvements are amortized using the straight-line method
over the shorter of the lease term or the estimated useful lives of the related
assets.
 
(h) REVENUE RECOGNITION
 
    Revenue from development contracts is recognized as the relevant technical
milestones are attained. Revenue from licensing is recognized when the
nonrefundable fees are received and the license is executed. Revenue from
product sales, net of estimated product returns, is recognized upon product
shipment when title passes to the buyer.
 
(i) PARTNER REVENUE
 
    Partner revenue consists principally of milestone payments, licensing fees
and proceeds from sales of reagents to collaborative partners for research
purposes.
 
(j) ADVERTISING COSTS
 
    All costs related to marketing and production costs of advertising the
Company's products are expensed in the period incurred.
 
(k) FOREIGN CURRENCY
 
    Foreign currency transactions and financial statements are translated into
U.S. dollars at current rates, except that revenue, costs and expenses are
translated at average rates during each reporting period. Gains and losses
resulting from foreign currency transactions and intercompany balances expected
to be paid in the foreseeable future are included in results of operations.
Gains and losses resulting from translation of financial statements are excluded
from results of operations and are reflected as a cumulative translation
adjustment, which is reported as a separate component of shareholders' equity.
The Company has sales denominated in foreign currencies, primarily the British
pound and the Italian lira. The Company offsets the foreign currency exposure of
these sales with expenses denominated in local currencies. The Company does not
utilize foreign currency forwards or option contracts to manage its foreign
currency exposure. As of June 30, 1997, the Company has not experienced material
gains or losses from foreign currency fluctuations.
 
                                       35
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(1) THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
(l) STOCK SPLIT
 
    In April 1995, the Company's Board of Directors approved a one-for-six
reverse split of the Company's common and preferred stock. All references in the
accompanying financial statements to the number of shares of common stock and
per share amounts have been retroactively restated to reflect this stock split.
 
(m) NET LOSS PER SHARE
 
    Except as noted below, net loss per share is computed using the weighted
average number of shares of common stock outstanding. Common equivalent shares
from stock options and warrants are excluded from the computation as their
effect is anti-dilutive, except that, pursuant to the Securities and Exchange
Commission Staff Accounting Bulletin No. 83, common stock issued for
consideration below the Company's initial public offering (IPO) price and stock
options granted with exercise prices below the IPO price during the 12-month
period preceding the date of the initial filing of the IPO Registration
Statement, even when anti-dilutive, have been included in the calculation of
common equivalent shares for all periods prior to the closing of the Company's
IPO (using the treasury stock method for stock options based on the initial
public offering price).
 
    Furthermore, pursuant to Securities and Exchange Commission staff policy,
common equivalent shares from convertible preferred stock and warrants that were
converted upon the completion of the Company's IPO are included (using the as
if-converted method) for all periods prior to the closing of the Company's IPO.
 
    In February 1997, the Financial Accounting Standards Board issued SFAS No.
128, "Earnings Per Share," which the Company is required to adopt in the second
quarter of fiscal 1998. At that time, the Company will be required to change the
method currently used to compute earnings per share. Since the Company has
reported losses since inception, SFAS No. 128 will not result in a change in the
reported earnings per share.
 
(n) USE OF ESTIMATES
 
    The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes. Actual amounts could differ from those estimates.
 
(o) STOCK-BASED COMPENSATION
 
    In October 1995, the Financial Accounting Standards Board issued SFAS No.
123, "Accounting for Stock-Based Compensation". As permitted by SFAS No. 123,
the Company accounts for stock options under the provisions of Accounting
Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees."
Accordingly, the Company does not record compensation expense for stock option
grants to employees and directors when the exercise price equals or exceeds the
market price of the Company's common stock on the date of grant. The Company
recognizes compensation expense for options granted to consultants and other
non-employees based upon the fair value of the options granted at the grant
date. Such amounts have not been material in any period presented.
 
                                       36
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(2) INVESTMENTS
 
    Investments consisted of the following at June 30:
 
<TABLE>
<CAPTION>
                                             1997                                          1996
                         --------------------------------------------  --------------------------------------------
                                   UNREALIZED   UNREALIZED     FAIR              UNREALIZED   UNREALIZED     FAIR
                           COST      GAINS        LOSSES      VALUE      COST      GAINS        LOSSES      VALUE
                         --------  ----------   ----------   --------  --------  ----------   ----------   --------
                                                               (IN THOUSANDS)
<S>                      <C>       <C>          <C>          <C>       <C>       <C>          <C>          <C>
Corporate bonds and
  notes................  $ 18,635    $  13        $  (4)     $ 18,644  $ 12,188    $--          $ (14)     $ 12,174
Commercial paper.......     3,492    --           --            3,492     7,640    --           --            7,640
U.S. government
  securities...........     4,499        5        --            4,504     8,527    --             (11)        8,516
Mortgaged-backed
  securities...........     6,284    --              (5)        6,279    12,148        1          (17)       12,132
State and municipal
  obligations..........     3,327        1        --            3,328     2,400    --           --            2,400
Other debt
  securities...........     2,461    --                         2,461     4,434    --           --            4,434
                         --------    -----        -----      --------  --------    -----        -----      --------
                           38,698       19           (9)       38,708    47,337        1          (42)       47,296
Marketable equity
  securities...........     2,450    --             (23)        2,427     4,750    --             (42)        4,708
                         --------    -----        -----      --------  --------    -----        -----      --------
Total
  available-for-sale
  securities...........    41,148       19          (32)       41,135    52,087        1          (84)       52,004
Less amounts classified
  as cash
  equivalents..........   (13,704)   --           --          (13,704)  (18,974)                            (18,974)
                         --------    -----        -----      --------  --------    -----        -----      --------
Total investments......  $ 27,444    $  19        $ (32)     $ 27,431  $ 33,113    $   1        $ (84)     $ 33,030
                         --------    -----        -----      --------  --------    -----        -----      --------
                         --------    -----        -----      --------  --------    -----        -----      --------
</TABLE>
 
    There were no material proceeds or gross realized gains or losses in the
years ended June 30, 1997, 1996 or 1995.
 
    The cost and estimated fair value of securities available-for-sale as of
June 30, 1997, by contractual maturity, consisted of the following:
 
<TABLE>
<CAPTION>
                                                                                       FAIR
                                                                            COST       VALUE
                                                                          ---------  ---------
                                                                             (IN THOUSANDS)
<S>                                                                       <C>        <C>
Due in one year or less.................................................  $  23,870  $  23,874
Due in one to three years...............................................      8,544      8,555
                                                                          ---------  ---------
                                                                             32,414     32,429
Marketable equity securities............................................      2,450      2,427
Mortgage-backed securities..............................................      6,284      6,279
                                                                          ---------  ---------
                                                                          $  41,148  $  41,135
                                                                          ---------  ---------
                                                                          ---------  ---------
</TABLE>
 
                                       37
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(3) INVENTORIES
 
    Inventories consist of the following:
 
<TABLE>
<CAPTION>
                                                                    JUNE 30,
                                                              --------------------
                                                                1997       1996
                                                              ---------  ---------
                                                                 (IN THOUSANDS)
<S>                                                           <C>        <C>
Raw materials...............................................  $     224  $     216
Work in process.............................................         95     --
Finished goods..............................................      1,127        824
                                                              ---------  ---------
                                                              $   1,446  $   1,040
                                                              ---------  ---------
                                                              ---------  ---------
</TABLE>
 
(4) PROPERTY AND EQUIPMENT
 
    Property and equipment consists of the following:
 
<TABLE>
<CAPTION>
                                                                  JUNE 30,
                                                            --------------------
                                                              1997       1996
                                                            ---------  ---------
                                                               (IN THOUSANDS)
<S>                                                         <C>        <C>
Machinery and equipment...................................  $   4,023  $   3,014
Furniture and fixtures....................................        171        164
Leasehold improvements....................................      2,999      2,987
                                                            ---------  ---------
                                                                7,193      6,165
Less accumulated depreciation and amortization............     (3,011)    (1,851)
                                                            ---------  ---------
                                                            $   4,182  $   4,314
                                                            ---------  ---------
                                                            ---------  ---------
</TABLE>
 
    Included in property and equipment is approximately $2,770,000 and
$2,063,000 of equipment recorded under capital lease agreements at June 30, 1997
and 1996, respectively. Accumulated amortization related to this equipment was
approximately $1,083,000, and $367,000 as of June 30, 1997 and 1996,
respectively. During the years ended June 30, 1997 and 1996, the Company
disposed of and retired fully depreciated property and equipment having a
historical cost of $135,000 and $247,000, respectively.
 
(5) ACCRUED EXPENSES
 
    A summary of accrued expenses follows:
 
<TABLE>
<CAPTION>
                                                                    JUNE 30,
                                                              --------------------
                                                                1997       1996
                                                              ---------  ---------
                                                                 (IN THOUSANDS)
<S>                                                           <C>        <C>
Promotional and educational marketing expenses..............  $      19  $     422
Payroll-related.............................................        525        363
Contract manufacturing......................................        400     --
Other.......................................................      1,539      1,025
                                                              ---------  ---------
                                                              $   2,483  $   1,810
                                                              ---------  ---------
                                                              ---------  ---------
</TABLE>
 
                                       38
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(6) LEASE COMMITMENTS
 
    The Company leases certain equipment and its facilities under leases
classified as capital and operating leases, respectively. These leases expire at
various dates through 2002. Future minimum lease payments relating to these
non-cancelable leases are as follows:
 
<TABLE>
<CAPTION>
                                                                            CAPITAL    OPERATING
YEAR ENDED JUNE 30:                                                         LEASES      LEASES
- -------------------------------------------------------------------------  ---------  -----------
<S>                                                                        <C>        <C>
                                                                               (IN THOUSANDS)
    1998.................................................................  $     767   $     581
    1999.................................................................        767         341
    2000.................................................................        768         341
    2001.................................................................        245         315
    2002.................................................................     --              13
                                                                           ---------  -----------
Total minimum lease payments.............................................      2,547   $   1,595
                                                                                      -----------
                                                                                      -----------
Less amount representing interest........................................       (407)
                                                                           ---------
Present value of minimum lease payments..................................      2,140
Less current portion of capital lease obligations........................       (566)
                                                                           ---------
Long-term portion of capital lease obligations...........................  $   1,574
                                                                           ---------
                                                                           ---------
</TABLE>
 
    Interest expense related to capital leases was $210,000, $106,000 and
$30,000 for the years ended June 30, 1997, 1996 and 1995, respectively. Rent
expense for the years ended June 30, 1997, 1996, and 1995 was approximately
$317,000, $322,000 and $169,000, respectively.
 
(7) SHAREHOLDERS' EQUITY
 
(a) COMMON STOCK SUBJECT TO REPURCHASE
 
    Since inception, 289,165 shares of common stock have been issued to certain
individuals under stock purchase agreements that permit the Company to
repurchase, at the original issuance price, a portion of such shares in the
event an individual shareholder ceases to be associated with the Company. The
shares subject to repurchase generally expire on a pro-rata basis over a
four-year period. As of June 30, 1997 and 1996, there were approximately 15,626
and 51,563 shares, respectively, subject to repurchase.
 
(b) SHAREHOLDER RIGHTS PLAN
 
    Under the Company's Shareholder Rights Plan, adopted in August 1996, one
preferred share purchase right (a "Right") is attached to each share of common
stock of the Company. Each Right will entitle shareholders to purchase 1/1000 of
a share of Series A participating preferred stock of the Company, a designated
series of preferred stock for which each 1/1000 of a share has economic
attributes and voting rights equivalent to one share of the Company's common
stock, at an exercise price of $50. The Rights only become exercisable in
certain limited circumstances involving acquisitions of 20% or tender offers for
30% or more of the Company's common stock. For a limited period of time after
the announcement of any such acquisition or offer, the Rights are redeemable at
a price of $.01 per Right. After becoming exercisable, in certain more limited
circumstances, each Right entitles its holder to
 
                                       39
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(7) SHAREHOLDERS' EQUITY (CONTINUED)
purchase for $50 an amount of common stock of the Company, or in certain
circumstances, securities of the acquiror, having a then current market value
equal to $100. The Rights expire in August, 2006.
 
(c) NOTES RECEIVABLE FROM SHAREHOLDERS
 
    At June 30, 1997, the Company had one note receivable from a shareholder
totaling $40,000 for a purchase of common stock at an interest rate of 7.60%. At
June 30, 1996, the Company had two notes receivable outstanding from
shareholders totaling $90,000 for purchases of common stock at an interest rate
of 7.60%. At June 30, 1995, the Company had five notes receivable outstanding
from shareholders totaling $169,000 for purchases of common stock at interest
rates ranging from 5.47% to 7.60%. Full payment of principal and accrued
interest on the notes is due four years from the date of purchase of the common
stock.
 
(8) STOCK OPTION AND PURCHASE PLANS
 
(a) 1990 INCENTIVE STOCK PLAN
 
    The Company has reserved 700,000 shares for issuance under its 1990
Incentive Stock Plan which provided for stock options to be granted to employees
(including consultants, officers, and directors). Upon the adoption of the
Company's 1995 Stock Option Plan, the Company's Board of Directors determined to
make no future grants under the 1990 Incentive Stock Plan. Options available for
grant and options outstanding as of June 30, 1997 under the 1990 Incentive Stock
Plan were 81,131 and 161,372, respectively.
 
    The Company has recorded deferred compensation of $575,000 related to
certain of the Company's common stock options granted for the year ended June
30, 1995 under the 1990 Incentive Stock Plan. This amount is being amortized
over the relevant period of benefit. For the years ended June 30, 1997, 1996 and
1995, $38,000, $108,000 and $388,000, respectively, was amortized.
 
(b) 1995 STOCK OPTION PLAN
 
    The Company's 1995 Stock Option Plan (the "1995 Option Plan") was adopted by
the Board of Directors in April 1995 and was approved by the Company's
shareholders in June 1995. An aggregate of 1,000,000 shares of the Company's
common stock were initially reserved for issuance under the 1995 Option Plan. An
additional 500,000 shares were reserved for issuance in December 1996. The 1995
Option Plan provides for the granting to employees of incentive stock options
and for the granting to consultants of nonstatutory stock options. The exercise
price of all incentive stock options granted under the 1995 Option Plan must be
at least equal to the fair market value of the common stock of the Company on
the date of grant (at least 85% of the fair market value for nonstatutory stock
options). The exercise price of any incentive stock option granted to an
optionee who owns stock representing more than 10% of the voting power of the
Company's outstanding capital stock must equal at least 110% of the fair market
value of the common stock on the date of grant. Options generally become
exercisable over 4 years and have a ten year term. With respect to any
participant who owns stock possessing more than 10% of the voting power of all
classes of stock of the Company, the maximum term of the option must not exceed
five years. If not terminated earlier, the 1995 Stock Option Plan will terminate
in 2005.
 
    Options available for grant and options outstanding as of June 30, 1997
under the 1995 Option Plan were 502,073 and 993,709, respectively.
 
                                       40
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(8) STOCK OPTION AND PURCHASE PLANS (CONTINUED)
 
(c) 1995 DIRECTOR STOCK OPTION PLAN
 
    The 1995 Director Stock Option Plan (the Directors' Plan) was adopted by the
Board of Directors in April 1995 and was approved by the Company's shareholders
in June 1995. A total of 200,000 shares of common stock has been reserved for
issuance under the Directors' Plan. The Directors' Plan provides for the grant
of nonstatutory stock options to nonemployee directors of the Company. The
Directors' Plan provides that each person who was a nonemployee director of the
Company on the date of the Company's IPO and each person who first becomes a
nonemployee director of the Company after the date of the Company's IPO shall be
granted a nonstatutory stock option to purchase 10,000 shares of common stock
(the First Option) on the effective date of the Company's IPO or on the date on
which the optionee first becomes a nonemployee director of the Company.
Thereafter, on the date of each annual meeting of the Company's shareholders at
which such director is elected, each such nonemployee director shall be granted
an additional option to purchase 5,000 shares of common stock (a Subsequent
Option) if, on such date, he or she shall have served on the Company's Board of
Directors for at least six months. The Directors' Plan provides that the First
Option shall become exercisable in installments as to 25% of the total number of
shares subject to the First Option on each of the first, second, third and
fourth anniversaries of the date of grant of the First Option; each Subsequent
Option shall become exercisable in full on the first anniversary of the date of
grant of that Subsequent Option. The exercise price of all stock options granted
under the Directors' Plan shall be equal to the fair market value of a share of
the Company's common stock on the date of grant of the option. Options granted
under the Directors' Plan have a term of ten years.
 
    Options available for grant and options outstanding as of June 30, 1997
under the Directors' Plan were 95,000 and 105,000, respectively.
 
                                       41
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(8) STOCK OPTION AND PURCHASE PLANS (CONTINUED)
(d) SUMMARY STOCK OPTION INFORMATION
 
    The following table summarizes option activity under the stock option plans:
 
<TABLE>
<CAPTION>
                                                            OPTIONS         TOTAL        RANGE OF       WEIGHTED
                                                         AVAILABLE FOR     OPTIONS       EXERCISE     AVERAGE PRICE
                                                             GRANT       OUTSTANDING      PRICES        PER SHARE
                                                         -------------   -----------   -------------  -------------
<S>                                                      <C>             <C>           <C>            <C>
Balances as of June 30, 1994...........................        262,489      164,682     $0.03-$1.20      $ 0.44
  Options authorized...................................        200,000       --             --           --
  Options granted......................................       (342,707)     342,707     1.20-10.00         3.73
  Options exercised....................................       --           (111,253)     0.24-1.20         1.08
  Options canceled.....................................         24,477      (24,477)     0.24-9.00         1.88
                                                         -------------   -----------
Balances as of June 30, 1995...........................        144,259      371,659     0.03-10.00         3.18
  Options authorized...................................      1,000,000       --             --           --
  Options granted......................................       (937,733)     937,733     0.46-20.88        14.29
  Options exercised....................................       --            (79,813)    0.03-14.50         1.07
  Options canceled.....................................        349,529     (349,529)    0.48-20.88        15.34
                                                         -------------   -----------
Balances as of June 30, 1996...........................        556,055      880,050     0.24-19.81        10.38
  Options authorized...................................        500,000       --             --           --
  Options granted......................................     (1,115,165)   1,115,165      4.50-5.88         5.00
  Options exercised....................................       --            (14,314)     0.46-6.00         1.86
  Options canceled.....................................        720,820     (720,820)    0.46-15.50        11.93
  Shares repurchased...................................         16,494       --             --           --
                                                         -------------   -----------
Balances as of June 30, 1997...........................        678,204    1,260,081    $0.24-$19.81        4.83
                                                         -------------   -----------
                                                         -------------   -----------
</TABLE>
 
    The following table summarizes information about options outstanding as of
June 30, 1997:
 
<TABLE>
<CAPTION>
                                                  OUTSTANDING                       EXERCISABLE
                                   -----------------------------------------  ------------------------
                                                                  WEIGHTED                  WEIGHTED
                                              WEIGHTED AVERAGE     AVERAGE                   AVERAGE
RANGE OF                           NUMBER OF  CONTRACTUAL LIFE    EXERCISE     NUMBER OF    EXERCISE
EXERCISE PRICES                     SHARES       (IN YEARS)         PRICE       SHARES        PRICE
- ---------------------------------  ---------  -----------------  -----------  -----------  -----------
<S>                                <C>        <C>                <C>          <C>          <C>
$0.24-$2.29......................    154,221            5.8       $    0.83      124,948    $    0.76
$4.50-$6.00......................  1,018,363            8.7       $    4.99      171,987    $    5.10
$9.00-$19.81.....................     87,497            8.0       $   10.05       29,418    $   10.33
                                   ---------                                  -----------
  Total..........................  1,260,081            8.3       $    4.83      326,353    $    3.91
                                   ---------                                  -----------
                                   ---------                                  -----------
</TABLE>
 
    At June 30, 1997, 1996 and 1995 options for 326,353, 139,389 and 119,169
shares, respectively, were exercisable under the stock options plans.
 
    In 1995, 19,343 options were issued at prices ranging from $0.46-$2.29 per
share due to the conversion of options held by Osteo Science option in
connection with the Osteo Sciences acquisition. On January 31, 1996, the
Company's Board of Directors approved an option exchange, subject to election by
the option holders, whereby options to purchase 272,400 shares of the Company's
common stock at prices ranging from $17.00 to $20.88 per share were canceled and
reissued at $15.25 per share which was the fair market
 
                                       42
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(8) STOCK OPTION AND PURCHASE PLANS (CONTINUED)
value of the Company's common stock on that date. The new options generally vest
over four years beginning January 31, 1996. On August 21, 1996, the Company's
Board of Directors approved an option exchange, subject to election by the
option holders, whereby options to purchase 550,485 shares of the Company's
common stock at prices ranging from $6.50 to $15.50 per share were canceled and
reissued at $5.00 per share which was the fair market value of the Company's
common stock on that date. The new options generally vest over four years
beginning August 21, 1996.
 
(e) PRO FORMA INFORMATION
 
    If the Company had elected to recognize compensation cost based on the fair
value of stock options granted, as prescribed under SFAS No. 123, net loss and
net loss per share would have been increased to the pro forma amounts indicated
in the table below:
 
<TABLE>
<CAPTION>
                                                                        1997        1996
                                                                     ----------  ----------
<S>                                                                  <C>         <C>
                                                                     (IN THOUSANDS, EXCEPT
                                                                       PER SHARE AMOUNTS)
Net Loss--as reported..............................................  $  (13,127) $  (21,399)
Net loss--pro forma................................................  $  (14,471) $  (22,152)
Net loss per share--as reported....................................  $    (1.04) $    (2.04)
Net loss per share--pro forma......................................  $    (1.15) $    (2.11)
</TABLE>
 
    The fair value of each option grant, for purposes of calculating the pro
forma net loss above was estimated using the Black-Scholes option-pricing model
with the following assumptions:
 
<TABLE>
<S>                                                               <C>
Expected stock price volatility.................................     .67
Risk-free interest rate range...................................   5.5-6.5%
Expected life of options........................................  1-4 years
Dividend yield..................................................      0%
</TABLE>
 
    The Black-Scholes option valuation model was developed for use in estimating
the fair value of traded options that have no vesting restrictions and are fully
transferable. In addition, option valuation models require the input of highly
subjective assumptions, including the expected stock price volatility. Because
the Company's options have characteristics significantly different from those of
traded options, and because changes in the subjective input assumptions can
materially affect the fair value estimate, in the opinion of management, the
existing models do not necessarily provide a reliable single measure of the fair
value of its options. The weighted average estimated fair value of employee
stock options granted during 1997 and 1996 computed using the Black-Scholes
method was $2.13 and $5.75 per share, respectively.
 
    Because SFAS No. 123 is applicable only to options granted subsequent to
June 30, 1995, its pro forma effect will not be fully reflected until 1999.
 
(f) 1995 EMPLOYEE STOCK PURCHASE PLAN
 
    The Company's 1995 Employee Stock Purchase Plan (the Purchase Plan) was
adopted by the Board of Directors in April 1995 and was approved by the
shareholders in June 1995. A total of 200,000 shares of common stock has been
reserved for issuance under the Purchase Plan. The Purchase Plan has two six-
month offering periods each year. The Purchase Plan is administered by the Board
of Directors.
 
                                       43
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(8) STOCK OPTION AND PURCHASE PLANS (CONTINUED)
Employees (including officers and employee directors) of the Company, or of any
majority owned subsidiary designated by the Board, are eligible to participate
if they are customarily employed by the Company or any such subsidiary for at
least 20 hours per week and more than five months per year. The Purchase Plan
permits eligible employees to purchase common stock through payroll deductions,
which may not exceed 5% of an employee's compensation, at a price equal to the
lower of 85% of the fair market value of the Company's common stock at the
beginning or end of the offering period. Common stock purchased under the
Purchase Plan must be held for a period of six months before it may be sold.
Employees may end their participation in the offering at any time during the
offering period, and participation ends automatically on termination of
employment with the Company.
 
    Purchases of shares made under the Purchase Plan were 32,030 and 19,114 for
the years ended June 30, 1997 and 1996, respectively.
 
(9) DEVELOPMENT AND LICENSE AGREEMENTS
 
    The Company has a significant number of development and license agreements,
most of which relate to the use of the Company's technology on the automated
diagnostic testing systems of the partner. Revenues earned from milestone and
licensing fees under development and license agreements were $100,000,
$1,670,000 and $414,000 for the years ended June 30, 1997, 1996 and 1995,
respectively. No royalty payments have been received by the Company. Other
partner revenues were earned for sales of reagents to customers.
 
    Significant development and license agreements include the following:
 
    SUMITOMO PHARMACEUTICALS CO., LTD.
 
    In March 1993, the Company entered into a research and development agreement
with Sumitomo Pharmaceuticals Co., Ltd. (Sumitomo). Under the terms of the
agreement, the Company will update existing, and develop new, diagnostic assay
kits for the detection and management of bone and other connective tissue
diseases. The marketing and distribution rights resulting from this agreement
will be held by Sumitomo in Japan. Under certain circumstances, Sumitomo will
also have the right to acquire marketing and distribution rights in certain
Asian markets. Under the agreement, the Company will also manufacture and supply
the products at formula prices which are subject to periodic renegotiation. The
term of the agreement is for an initial ten-year period with options to extend
the term upon mutual consent. Sumitomo has the right to terminate the agreement
upon six months written notice. Payments for certain ongoing costs of research
and development incurred by the Company are payable to the Company under the
agreement upon the achievement of certain milestones and regulatory approvals.
 
    In June 1994 and February 1995, the Company entered into two additional
agreements with Sumitomo, granting Sumitomo certain additional marketing and
distribution rights. These agreements call for Sumitomo to pay the Company
certain amounts upon the achievement of certain milestones and regulatory
approvals.
 
    THE ROWETT RESEARCH INSTITUTE
 
    In May 1990, the Company licensed certain technology from The Rowett
Research Institute (Rowett) in exchange for 25,000 shares of common stock, an
obligation to pay royalties on a percentage of net sales
 
                                       44
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(9) DEVELOPMENT AND LICENSE AGREEMENTS (CONTINUED)
for a period of approximately 10 years and an obligation to issue additional
common stock upon attainment of certain milestones. In February 1994, the first
milestone was attained in the United Kingdom. Accordingly, in September 1994,
the Company issued 16,666 shares of common stock to Rowett valued at $3.00 per
share. In May, 1995, the other milestone was attained and the Company issued the
second 16,666 shares of common stock to Rowett valued at $9.00 per share.
 
(10) OTHER AGREEMENTS
 
    In April 1997, the Company entered into a Co-Promotion Agreement with Berlex
Laboratories, Inc. ("Berlex"). The Company will pay Berlex approximately $3
million in December 1997 for promotional activities performed by Berlex over the
first year of the promotional agreement, starting on July 1, 1997. The $3
million will be recognized as expense ratably over the initial one year term. In
connection with this agreement, the Company issued Berlex warrants to acquire
413,233 shares of common stock at an exercise price of $4.84 per share. The
warrant has a four year term. The fair value of the warrants issued to Berlex,
as measured using the Black-Scholes pricing method, of $506,000 will also be
amortized over the initial one year service period. In addition, the Company
will pay Berlex additional commissions based upon increased sales of the
Company's products to the extent such sales are above previously established
levels. After the first promotional year, the future continuance of the
promotional agreement and the associated financial cost to Metra is, in part,
dependent upon the achievement of certain milestones and the mutual consent of
both parties.
 
(11) INCOME TAXES
 
    Due to the operating losses incurred since inception, income tax expense for
all periods has consisted only of minimum state taxes.
 
    Income tax expense differed from the amounts computed by applying the U.S.
federal income tax rate of 34% of pretax losses as a result of the following:
 
<TABLE>
<CAPTION>
                                                               JUNE 30,
                                                    -------------------------------
                                                      1997       1996       1995
                                                    ---------  ---------  ---------
                                                            (IN THOUSANDS)
<S>                                                 <C>        <C>        <C>
Computed "expected" tax benefit...................  $  (4,193) $  (7,276) $  (2,313)
Losses and credits for which no benefit has been
  recognized......................................      4,145      3,139      1,988
Purchased research and development................     --          3,839     --
Change in the beginning of the year valuation
  allowance, including use of net operating loss
  carryforwards and foreign losses................         23        280        315
Other.............................................         25         18         10
                                                    ---------  ---------  ---------
                                                    $  --      $  --      $  --
                                                    ---------  ---------  ---------
                                                    ---------  ---------  ---------
</TABLE>
 
                                       45
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(11) INCOME TAXES (CONTINUED)
 
    The tax effect of temporary differences that give rise to significant
portions of the Company's deferred tax assets and liabilities is presented
below:
 
<TABLE>
<CAPTION>
                                                          YEAR ENDED JUNE 30,
                                                          --------------------
                                                            1997       1996
                                                          ---------  ---------
                                                             (IN THOUSANDS)
<S>                                                       <C>        <C>
Deferred tax assets:
  Employee benefit reserves, including accrued
    vacation............................................  $     152  $      64
  Other operating reserves..............................        314        173
  Amortization of deferred compensation.................     --            199
  Inventory capitalization..............................        146        162
  Start-up and other capitalization.....................         52        140
  Patent and licensed technology amortization...........        203        113
  Capitalized research and development..................        285     --
  Book depreciation in excess of tax....................        269     --
  Charitable contribution...............................         27         19
  Net operating loss carryforwards......................     13,771     10,090
  Research and development credits......................        844        631
                                                          ---------  ---------
    Total gross deferred tax assets.....................     16,063     11,591
  Less valuation allowance..............................    (16,042)   (11,569)
                                                          ---------  ---------
    Net deferred tax assets.............................         21         22
Deferred tax liabilities:
  Tax depreciation in excess of books...................     --            (22)
  Other.................................................        (21)    --
                                                          ---------  ---------
    Deferred tax assets (liabilities)...................  $  --      $  --
                                                          ---------  ---------
                                                          ---------  ---------
</TABLE>
 
    Management believes significant uncertainty exists regarding the ability to
realize the Company's deferred tax assets and accordingly, a valuation allowance
has been established. The valuation allowance for deferred tax assets as of July
1, 1995 was $7,214,000. The net change in the valuation allowance for the years
ended June 30, 1997, 1996 and 1995 was an increase of $4,473,000, $4,355,000 and
$2,531,000 respectively. If realized, approximately $231,000 of deferred tax
assets will be credited to paid-in-capital.
 
    As of June 30, 1997 and 1996, the Company had federal tax net operating loss
carryforwards of approximately $38,174,000, and $27,193,000, respectively, which
expire in 2004 through 2011. The Company also had foreign loss carryforwards of
$1,070,000 and $806,000 at June 30, 1997 and 1996, respectively, which extend
indefinitely.
 
    The Company also has federal research and development credit carryforwards
of approximately $572,000 and $436,000 at June 30, 1997 and 1996, respectively,
which will expire in 2004 through 2011.
 
    State tax net operating loss carryforwards were approximately $13,572,000
and $13,206,000 and research and development credit carryforwards were $370,000
and $295,000 at June 30, 1997 and 1996, respectively. The state losses expire in
1997 through 2001 and the credits expire in 2004 through 2011.
 
                                       46
<PAGE>
                             METRA BIOSYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                                 JUNE 30, 1997
 
(11) INCOME TAXES (CONTINUED)
    The Company's ability to utilize federal and state net operating loss
carryforwards and research credits may be subject to a substantial annual
limitation due to the "change in ownership" provisions of the Internal Revenue
Code of 1986 and similar state provisions. The annual limitation may result in
the expiration of net operating loss carryforwards and credits before
utilization.
 
(12) EMPLOYEE BENEFITS
 
    The Company has a deferred savings 401(k) plan for its domestic employees.
The Company may make matching contributions to the plan at its discretion. To
date, no contributions have been made by the Company to the plan.
 
(13) INDUSTRY AND GEOGRAPHIC INFORMATION
 
    The Company markets its products in the United States and in foreign
countries through its sales personnel and distributors. Export sales account for
a significant portion of the Company's product sales which are summarized by
geographic area as follows:
 
<TABLE>
<CAPTION>
                                                            YEAR ENDED JUNE 30,
                                                      -------------------------------
                                                        1997       1996       1995
                                                      ---------  ---------  ---------
                                                              (IN THOUSANDS)
<S>                                                   <C>        <C>        <C>
United States.......................................  $   1,480  $     987  $     569
Export sales:
  Europe............................................      3,581      2,279      1,231
  Pacific Rim.......................................        993        917        624
  Other international...............................        351        230        128
                                                      ---------  ---------  ---------
    Total export sales..............................      4,925      3,426      1,983
                                                      ---------  ---------  ---------
    Total product sales.............................  $   6,405  $   4,413  $   2,552
                                                      ---------  ---------  ---------
                                                      ---------  ---------  ---------
</TABLE>
 
(14) ACQUISITION OF OSTEO SCIENCES CORPORATION
 
    On January 31, 1996, the Company purchased Osteo Sciences Corporation
("Osteo") in a tax free exchange which resulted in shareholders of Osteo
exchanging all of their shares of preferred and common stock for shares of the
Company's common stock. The Company issued 541,072 shares of common stock to
Osteo shareholders valued at approximately $9,672,000 and assumed options to
purchase 19,343 shares of the Company's common stock valued at approximately
$345,000. The transaction was recorded using the purchase method of accounting
and resulted in the Company incurring a one-time charge of $11,291,000 for
acquired in-process research and development. The operations of Osteo were
included in the Company's results of operations beginning February 1, 1996. The
value of the research and development acquired from Osteo Sciences was
determined based upon an analysis of the present value of expected future cash
flows related to the technology. At the date of acquisition, technical
feasibility of the acquired technology had not yet been established and the
technology had no foreseeable future alternative uses.
 
                                       47
<PAGE>
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE
 
    Effective May 2, 1997, the Board of Directors of the Company engaged the
accounting firm of Ernst & Young LLP as independent public accountants for the
Company. The Company's former independent public accountants, KPMG Peat Marwick
LLP, were dismissed effective May 2, 1997. The Company's audit committee
recommended, and the Company's Board of Directors approved, these actions.
 
    During the two most recent fiscal years and subsequent interim periods prior
to May 2, 1997, there were no disagreements with KPMG Peat Marwick LLP on any
matter of accounting principles or practices, financial statement disclosure,
auditing scope or procedure, or any reportable events, which disagreements, if
not resolved to the satisfaction of KPMG Peat Marwick LLP, would have caused it
to make reference to the subject matter of such disagreements in connection with
its reports.
 
    The reports of KPMG Peat Marwick LLP on the financial statements of the
Company for the past two years contained no adverse opinion or disclaimer of
opinion, and were not qualified or modified as to uncertainty, audit scope or
accounting principles.
 
    The Company did not consult with Ernst & Young LLP during the two years
prior to their appointment as independent accountants of the Company regarding
either (i) the application of accounting principles to a specified transaction
or transactions, either completed or proposed, or (ii) the type of audit opinion
Ernst & Young LLP might render on the Company's financial statements.
 
    The Company requested that KPMG Peat Marwick LLP furnish a letter addressed
to the SEC stating whether they agree with the above statements. A copy of the
KPMG Peat Marwick LLP letter to the SEC, dated May 8, 1997 was filed as an
exhibit to the Form 8-K filed by the Company on May 9, 1997.
 
                                    PART III
 
ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
    Information regarding Registrant's directors will be set forth under the
caption "Election of Directors--Nominees" in Registrant's proxy statement for
use in connection with the 1997 Annual Meeting of Shareholders ("1997 Proxy
Statement") and is incorporated herein by reference. The 1997 Proxy Statement
will be filed with the Securities and Exchange Commission within 120 days after
the end of the Registrant's fiscal year.
 
    Information regarding Registrant's executive and other officers is set forth
in this Form 10-K in Part I, Item 1.
 
ITEM 11. EXECUTIVE COMPENSATION
 
    The information required by this item is incorporated by reference into this
Form 10-K from the information set forth under the caption "Compensation of
Executive Officers" in the 1997 Proxy Statement.
 
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
    The caption "Common Stock Ownership of Certain Beneficial Owners and
Management" in the information required by this item is incorporated by
reference into this Form 10-K from the information set forth under the 1997
Proxy Statement.
 
                                       48
<PAGE>
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
    The information required by this item is incorporated by reference into this
Form 10-K from the information set forth under the caption "Certain
Relationships and Related Transactions" in the 1997 Proxy Statement.
 
                                    PART IV
 
ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K
 
(a) CERTAIN DOCUMENTS FILED AS PART OF THE FORM 10-K
 
<TABLE>
<CAPTION>
   1.      Financial Statements                                                                   PAGE
                                                                                                  -----
<C>        <S>                                                                                 <C>
           Reports of Independent Auditors...................................................          28
           Consolidated Balance Sheets.......................................................          30
           Consolidated Statements of Operations.............................................          31
           Consolidated Statement of Shareholders' Equity (Deficit)..........................          32
           Consolidated Statements of Cash Flows.............................................          33
 
       2.  Financial Statement Schedules
</TABLE>
 
SCHEDULE II. VALUATION ACCOUNTS
 
<TABLE>
<CAPTION>
                                                           BALANCE AT     PROVISION
                                                           BEGINNING       CHARGED         AMOUNTS    BALANCE AT
                                                            OF YEAR     TO OPERATIONS     UTILIZED    END OF YEAR
                                                           ----------  ----------------  -----------  -----------
<S>                                                        <C>         <C>               <C>          <C>
ALLOWANCE FOR DOUBTFUL ACCOUNTS:
  Year ended June 30, 1995...............................  $   18,385     $   22,000     $    (7,197)  $  33,188
  Year ended June 30, 1996...............................      33,188         70,500          (3,000)    100,688
  Year ended June 30, 1997...............................     100,688         55,410          (8,754)    147,344
 
INVENTORY RESERVES:
  Year ended June 30, 1995...............................  $   91,696     $  236,597     $   (64,248)  $ 264,045
  Year ended June 30, 1996...............................     264,045        177,979        (112,105)    329,919
  Year ended June 30, 1997...............................     329,919        166,553        (148,472)    348,000
</TABLE>
 
    Schedules not listed above have been omitted because the information
required to be set forth therein is not applicable or is shown in the financial
statements or notes thereto.
 
(b) REPORTS ON FORM 8-K
 
    The Company filed a Report on Form 8-K, dated January 23, 1997, reporting
the approval of an amendment to the Rights Agreement to increase the ownership
threshold required to trigger the Rights Agreement from 15% to 20%.
 
    The Company filed a Report on Form 8-K, dated May 5, 1997, reporting the
change in certifying accountants from KPMG Peat Marwick LLP to Ernst & Young LLP
effective May 2, 1997.
 
                                       49
<PAGE>
(C) EXHIBITS
 
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER     DESCRIPTION OF DOCUMENT
- -----------  -----------------------------------------------------------------------------------------------------
<C>          <S>
   3.1*      Articles of Incorporation of Registrant
 
   3.2*      Form of Amended and Restated Articles of Incorporation of Registrant
 
   3.3*      Bylaws of Registrant
 
   4.2*      Rights Agreement among the Registrant and certain security holders of the Registrant, dated as of
               January 11, 1994
 
   4.99(b)   Amendment No. 1 to Preferred Shares Rights Agreement, dated as of January 17, 1997, between Metra
               Biosystems, Inc. and the First National Bank of Boston
 
  10.1*      Form of Indemnification Agreement
 
  10.2*      1990 Incentive Stock Plan
 
  10.2a*     Forms of agreements under 1990 Incentive Stock Plan
 
  10.3*      1995 Stock Option Plan
 
  10.3a*     Form of Option Agreement under 1995 Stock Option Plan
 
  10.4*      1995 Employee Stock Purchase Plan
 
  10.4a*     Form of Subscription Agreement under 1995 Employee Stock Purchase Plan
 
  10.5*      1995 Directors' Stock Option Plan
 
  10.5a*     Form of Option Agreement under 1995 Directors' Stock Option Plan
 
  10.6+*     Industrial Real Estate Lease (Single-Tenant Facility) and Lease Addendum, dated November 1, 1993,
               between the Registrant and State Teachers Retirement System, and First Amendment, dated as of July
               26, 1994, thereto
 
  10.7+*     License Agreement between the Registrant and The Rowett Research Institute, dated as of April 30,
               1990
 
  10.8+*     License Agreement between the Registrant and Collagen Corporation, dated as of June 30, 1990
 
  10.9+*     Distribution and License Agreement between the Registrant and Haematologic Technologies, Inc., dated
               as of September 1, 1992
 
  10.10+*    Product Research and Development Agreement between the Registrant and Sumitomo Pharmaceuticals Co.,
               Ltd., dated as of March 29, 1993
 
  10.11+*    License Agreement between the Registrant and Celtrix Pharmaceuticals, Inc., dated as of July 28, 1993
 
  10.12+*    License, Supply and Development Agreement between the Registrant and Hybritech Incorporated, dated as
               of September 15, 1993
 
  10.13+*    Development and License Agreement between the Registrant and Ciba-Geigy Limited, dated as of June 26,
               1990, as amended by the Agreement between Registrant and Ciba-Geigy Limited, dated as of November
               5, 1993
 
  10.14+*    License, Supply and Development Agreement between the Registrant and Ciba Corning Diagnostics Corp.,
               dated as of November 5, 1993
 
  10.15+*    OEM Agreement between the Registrant and Diagnostic Products Corporation, dated December 22, 1993
</TABLE>
 
                                       50
<PAGE>
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER     DESCRIPTION OF DOCUMENT
- -----------  -----------------------------------------------------------------------------------------------------
<C>          <S>
  10.16*(c)  Product Research and Development Agreement between the Registrant and Sumitomo Pharmaceuticals Co.,
               Ltd., dated as of June 29, 1994
 
  10.17+*    IDS OEM Agreement between the Registrant and Immunodiagnostic Systems Ltd., dated as of January 19,
               1995
 
  10.18+*    License Agreement between the Registrant and BioQuant, Inc., dated as of February 15, 1995
 
  10.19+*    Product Research and Development Agreement between the Registrant and Sumitomo Pharmaceuticals Co.,
               Ltd., dated as of February 28, 1995
 
  10.20*(c)  International Distributor Agreement between the Registrant and Amersham K.K., dated as of April 8,
               1993
 
  10.21+*    International Distributor Agreement between the Registrant and DPC Biermann GmbH, dated as of January
               1, 1995
 
  10.22*     Series D Preferred Stock Purchase Agreement, dated as of January 17, 1992, among the Registrant and
               certain Investors listed on Exhibit A thereto
 
  10.23*     Series E Preferred Stock Purchase Agreement, dated as of January 11, 1994, among the Registrant and
               certain Investors listed on Exhibit A thereto
 
  10.24*     Letter Agreement, dated as of May 24, 1991, between the Registrant and George W. Dunbar, Jr.
 
  10.25*     Letter Agreement, dated as of February 1, 1992, between the Registrant and Ronald T. Steckel
 
  10.26*     Promissory Note, dated as of September 11, 1991, executed by George W. Dunbar, Jr. and Lucy H. Dunbar
               in favor of the Registrant
 
  10.27*     Promissory Note, dated as of June 24, 1992, executed by Ronald T. Steckel and Laurie A. Steckel in
               favor of the Registrant
 
  10.28*     Promissory Note, dated as of July 16, 1992, executed by Ronald T. Steckel in favor of the Registrant
 
  10.29*     Promissory Note, dated as of July 18, 1993, executed by George W. Dunbar, Jr. in favor of the
               Registrant
 
  10.30*     Promissory Note, dated as of November 1, 1994, executed by Colette Z. Andrea in favor of the
               Registrant
 
  10.31*     Promissory Note, dated as of December 30, 1994, executed by George W. Dunbar, Jr. in favor of the
               Registrant
 
  10.32*     Promissory Note, dated as of December 30, 1994, executed by Colette Z. Andrea in favor of the
               Registrant
 
  10.33*     Promissory Note, dated as of December 30, 1994, executed by Ronald T. Steckel in favor of the
               Registrant
 
  10.34+     License and Supply Agreement between the Registrant and Bayer Corporation dated as of July 26, 1995
 
  10.43(a)   Separation and Mutual Release, dated September 18, 1996, between the Company and Colette Z. Andrea
 
  10.44+     Co-Promotion Agreement, dated April 25, 1997, between the Company and Berlex Laboratories, Inc.
</TABLE>
 
                                       51
<PAGE>
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER     DESCRIPTION OF DOCUMENT
- -----------  -----------------------------------------------------------------------------------------------------
<C>          <S>
  10.45      Form of Change in Control Agreement
 
  11.1       Computation of Earnings Per Share
 
  22.1*      List of Subsidiaries of the Registrant
 
  23.1       Consent of Ernst & Young LLP, Independent Auditors
 
  23.2       Consent of KPMG Peat Marwick LLP, Independent Auditors and Report on Schedules
 
  27.1       Financial Data Schedule
</TABLE>
 
- ------------------------
 
 * Incorporated by reference to identically numbered exhibits filed with the
    Company's Registration Statement (No. 33-92452) filed on May 18, 1995, or
    with Amendments No. 1 or Amendment No. 2 thereto, which became effective on
    June 30, 1995.
 
 + Confidential treatment granted or requested as to a portion of this Exhibit.
 
(a) Incorporated by reference to identically numbered exhibit filed with the
    Company's Form 10-Q/A filed on February 10, 1997.
 
(b) Incorporated by reference to identically numbered exhibit filed with the
    Company's Form 8-A/A filed on January 24, 1997.
 
(c) Incorporated by reference to identically numbered exhibit refiled with the
    Company's Form 10-Q filed on May 14, 1997.
 
                                       52
<PAGE>
                                   SIGNATURES
 
    Pursuant to the requirements of Section 13 or 15(d) the Securities Exchange
Act of 1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized.
 
                                METRA BIOSYSTEMS, INC.
 
                                By:          /s/ GEORGE W. DUNBAR, JR.
                                     -----------------------------------------
Date: September 24, 1997               PRESIDENT AND CHIEF EXECUTIVE OFFICER
 
    KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints George W. Dunbar and Kurt E. Amundson and each of
them, his attorneys-in-fact and agents, each with the power of substitution and
resubstitution, for him in any and all capacities, to sign any and all
amendments to this Report on Form 10-K, and to file the same, with exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in connection therewith, as fully as to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, or either of them, or
their or his substitute or substitutes, may do or cause to be done by virtue
hereof.
 
    PURSUANT TO THE REQUIREMENTS OF THE SECURITIES EXCHANGE ACT OF 1934, THIS
REPORT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE CAPACITIES AND ON THE
DATES INDICATED:
 
<TABLE>
<CAPTION>
          SIGNATURE                        TITLE                    DATE
- ------------------------------  ---------------------------  -------------------
 
<C>                             <S>                          <C>
                                President and Chief
  /s/ GEORGE W. DUNBAR, JR.       Executive Officer
- ------------------------------    (Principal Executive       September 24, 1997
    George W. Dunbar, Jr.         Officer)
 
                                Vice President and Chief
     /s/ KURT E. AMUNDSON         Financial Officer
- ------------------------------    (Principal Financial and   September 24, 1997
       Kurt E. Amundson           Accounting Officer)
 
  /s/ CLAUDE D. ARNAUD, M.D.
- ------------------------------  Director                     September 24, 1997
    Claude D. Arnaud, M.D.
 
  /s/ MARY LAKE POLAN, M.D.,
            PH.D.
- ------------------------------  Director                     September 24, 1997
 Mary Lake Polan, M.D., Ph.D.
 
   /s/ LEONARD D. SCHAEFFER
- ------------------------------  Director                     September 24, 1997
     Leonard D. Schaeffer
</TABLE>
 
                                       53
<PAGE>
<TABLE>
<CAPTION>
          SIGNATURE                        TITLE                    DATE
- ------------------------------  ---------------------------  -------------------
 
<C>                             <S>                          <C>
 /s/ COSTA G. SEVASTOPOULOS,
            PH.D.
- ------------------------------  Director                     September 24, 1997
Costa G. Sevastopoulos, Ph.D.
 
     /s/ CRAIG C. TAYLOR
- ------------------------------  Director                     September 24, 1997
       Craig C. Taylor
 
       /s/ SAMUEL URCIS
- ------------------------------  Director                     September 24, 1997
         Samuel Urcis
</TABLE>
 
                                       54

<PAGE>

                     METRA CO-PROMOTION AGREEMENT

                           by and between

                       METRA BIOSYSTEMS, INC.

                                and

                      BERLEX LABORATORIES, INC 

                           April 25, 1997








                 [X] CONFIDENTIAL TREATMENT REQUESTED.
        OMITTED PORTIONS FILED SEPARATELY WITH THE COMMISSION.



<PAGE>

                    METRA CO-PROMOTION AGREEMENT

     This METRA CO-PROMOTION AGREEMENT (the "AGREEMENT") is entered into as 
of this 25th day of April, 1997 (the "EFFECTIVE DATE") by and between: 

          METRA BIOSYSTEMS, INC., a California corporation ("METRA") with its 
     principal offices at 265 North Whisman Road, Mountain View, California  
     94043; and,

          BERLEX LABORATORIES, INC., ("BERLEX"), with offices at 300 
     Fairfield Road, Wayne, New Jersey 07470; with reference to the 
     following: 

                             RECITALS

     A.  Metra is a biomedical company in the business of developing and 
     marketing diagnostics, including biochemical markers and reagents, for 
     connective tissue disease.

     B.  Berlex is a pharmaceutical company doing business in the U.S. having 
     female health care as one of its business focuses.

     C.  The Berlex female health care hormone replacement therapy business 
     currently includes one estrogen replacement therapy product marketed 
     under the trademark Climara-Registered Trademark-.

     D.  Berlex promotes its Climara-Registered Trademark- product to the 
     OB/GYN market (which includes general physicians who are identified by 
     Berlex from time to time as high prescribers of women's heath care 
     therapeutics and shall be referred to as the "OB/GYN Market" and the 
     "OB/GYN physicians") which promotion involves detail calls by Berlex 
     salespersons on OB/GYN physicians and other appropriate health care 
     providers such as nurse-practitioners; advertisements in professional 
     publications; and appearances at medical conferences and industry trade 
     shows aimed at OB/GYN physicians.

     E.  Metra desires to have the Metra Products promoted to the OB/GYN 
     Market in the U.S. that Berlex targets for Berlex's Climara-Registered 
     Trademark- product.

     F.  Berlex desires to promote the Metra Products to the OB/GYN Market in 
     the U.S. through the mechanisms by which Berlex promotes Berlex's 
     Climara-Registered Trademark product to such market.

     G.  Upon the terms and conditions set forth below, Berlex, for a 
     consideration paid by Metra as provided below, will include the Metra 
     promotional message for the Metra Products and under certain conditions, 
     additional Metra products, in Berlex's promotional endeavors directed 
     toward the OB/GYN market in the U.S.

                [X] CONFIDENTIAL TREATMENT REQUESTED.
        OMITTED PORTIONS FILED SEPARATELY WITH THE COMMISSION.

<PAGE>

                             AGREEMENT 

     NOW, THEREFORE, in consideration of the mutual covenants and conditions 
set forth herein and other good and valuable consideration, the receipt and 
sufficiency of which are hereby acknowledged, the parties agree as follows: 

           ARTICLE 1:  DEFINITIONS; RULES OF CONSTRUCTION

     1.1  DEFINITIONS.  For purposes of this Agreement, in addition to the 
capitalized terms defined elsewhere in this Agreement, the following terms 
shall have the meanings ascribed to them below:

     1.2  "AFFILIATE" shall mean any corporation, partnership or other entity 
(collectively, an  "ENTITY" ):  (1) that is controlled by or controls a party 
(collectively, a  "CONTROLLED ENTITY" ); or (2) that is controlled by or 
controls any such Controlled Entity, in each instance of clause (1) or (2) for 
so long as such control continues.  For purposes of this definition, "CONTROL" 
shall mean the possession, directly or indirectly, of a majority of the voting 
power of such entity (whether through ownership of securities or partnership or 
other ownership interests, by contract or otherwise).

     1.3  "CONFIDENTIAL INFORMATION" shall mean any information disclosed 
pursuant to the Metra/Berlex nondisclosure agreement dated March 7, 1997 and 
disclosed in the course of this Agreement, which is identified as or should 
be reasonably understood to be confidential or proprietary to the disclosing 
party, including, but not limited to know-how, trade secrets, data, technical 
processes and formulas, product features, sales, cost and other unpublished 
financial information, product and business plans, projections, and marketing 
data.  "Confidential Information" shall not include information which:  (i) 
is known or becomes known to the recipient on the Effective Date directly or 
indirectly from a third party source other than one having an obligation of 
confidentiality to the providing party; (ii) hereafter becomes known 
(independently of disclosure by the providing party) to the recipient 
directly or indirectly from a source other than one having an obligation of 
confidentiality to the providing party; (iii) becomes publicly known or 
available or otherwise ceases to be secret or confidential, except through a 
breach of this Agreement by the recipient; or (iv) is or was independently 
developed by the recipient without use of or reference to the providing 
party's Confidential Information, as shown by evidence in the recipient's 
possession.

     1.4  "GROSS REVENUES" shall mean (i) all amounts invoiced by Metra and 
its Affiliates to unrelated third parties in connection with sales of the 
Metra Products in the U.S.; and (ii) all royalties received by Metra and its 
Affiliates from unrelated third parties in connection with the sale or use of 
the Metra Products in the U.S., less in the case of (i) and (ii), any royalty 
payments made by Metra to third party licensors, but in no event shall such 
royalty exceed [XXXX].

     1.5  "INTELLECTUAL PROPERTY RIGHTS" shall mean trade secrets, patents, 
copyrights, trademarks, know-how, moral rights and similar rights of any type 
under the laws of any 

                                      -2-

                     [X] CONFIDENTIAL TREATMENT REQUESTED.
             OMITTED PORTIONS FILED SEPARATELY WITH THE COMMISSION.

<PAGE>

governmental authority, domestic or foreign including all applications and 
registrations relating to any of the foregoing.

     1.6  RULES OF CONSTRUCTION.  As used in this Agreement, all terms used 
in the singular shall be deemed to include the plural, and vice versa, as the 
context may require.  The words "hereof," "herein" and "hereunder" and other 
words of similar import refer to this Agreement as a whole, including any 
exhibits hereto, as the same may from time to time be amended or 
supplemented.  The word "including" when used herein is not intended to be 
exclusive and means "including, without limitation."  The descriptive 
headings of this Agreement are inserted for convenience of reference only and 
do not constitute a part of and shall not be utilized in interpreting this 
Agreement.  The terms "party" and "parties" shall refer to Metra and Berlex, 
individually or collectively.  This Agreement has been negotiated by the 
parties hereto and their respective counsel and shall be fairly interpreted 
in accordance with its terms and without any rules of construction relating 
to which party drafted the Agreement being applied in favor of or against 
either party.

     1.7  "U.S." shall mean the United States of America, including its 
territories and possessions, and Puerto Rico.

     1.8  DEFINED TERMS.  The following terms are defined in the body of the 
Agreement at the locations specified:


          Defined Term                       Location
          ------------                       -------- 

          Agreement                          Introduction
          Berlex                             Introduction
          Berlex Indemnified Parties         Section 10.3.1
          Claim                              Section 10.3.1
          Effective Date                     Introduction
          Metra                              Introduction
          Metra Indemnified Parties          Section 10.3.4
          Metra Products                     Section 2.1(i)
          Metra Trademarks                   Section 2.1 (iii)
          OB/GYN Market                      Recitals
          Promotional Year                   Section 6.2.1
          Short Promotional Year             Section 6.2.1
          Term                               Section 7.1
          Third Anniversary Date             Section 7.1


                                      -3-

                     [X] CONFIDENTIAL TREATMENT REQUESTED.
             OMITTED PORTIONS FILED SEPARATELY WITH THE COMMISSION.


<PAGE>

                         ARTICLE 2:  GRANT OF RIGHTS

     2.1  LICENSE GRANT TO BERLEX.  Subject to all of the terms and conditions 
of this Agreement, Metra hereby grants to Berlex, during the Term of this 
Agreement:

          (i)  subject to Metra's marketing programs existing as of the 
Effective Date (which shall be made known to the Commercialization Committee 
and insofar as reasonably possible conducted synergistically with the 
promotional activities overseen by the Commercialization Committee) an 
exclusive right and license to promote  and detail (which shall not include 
the right to sell or distribute) to the OB/GYN Market in the U.S. the Metra 
products set forth on EXHIBIT A (hereinafter referred to as the "Metra 
Products").  The license granted to Berlex in this section means that Metra 
will not enter into any other agreement with any other pharmaceutical company 
to promote, detail or sell the Metra Products to the OB/GYN Market in the 
U.S.;

          (ii)  Notwithstanding anything contained herein to the contrary, 
Metra shall be under no obligation to continue the production of any Metra 
Product.  If at any time Metra decides to discontinue commercial support of a 
Metra Product, then upon sixty (60) days advance written notice to Berlex 
(which advance notice shall not be required if discontinuance is due to 
safety reasons), such Metra Product shall no longer be included on EXHIBIT A 
and shall no longer be subject to the provisions of this Agreement.  If Metra 
discontinues commercial support of a Metra Product, but commercializes 
another product which provides substantially the same diagnostic information 
as the discontinued Metra Product, then Metra shall promptly inform Berlex of 
the replacement product and provide Berlex with such information about the 
replacement product as Berlex shall reasonably request.  At Berlex's option 
the replacement product shall become a Metra Product listed on EXHIBIT A, at 
the same commission as the discontinued Metra Product; and

          (iii)  a non-exclusive right to promote the Metra Products under 
the trademarks, marks, and trade names that Metra may adopt from time to time 
("Metra's Trademarks").  Except as set forth in this Section 2.1(iii), 
nothing contained in this Agreement shall grant to Berlex any right, title or 
interest in Metra's Trademarks.  At no time during or after the term of this 
Agreement shall Berlex challenge or assist others to challenge Metra's 
Trademarks or the registration thereof or attempt to register any trademarks, 
marks or trade names confusingly similar to those of Metra.  All 
representations of Metra's Trademarks that Berlex intends to use shall first 
be submitted to Metra for approval, which shall not be unreasonably withheld 
and which shall be conveyed promptly to Berlex, of design, color, and other 
details or shall be exact copies of those used by Metra.  If any of Metra's 
Trademarks are to be used in conjunction with another trademark, then Metra's 
mark shall be presented equally legibly, equally prominently, and of equal or 
greater size than the other but nevertheless separated from the other so that 
each appears to be a mark in its own right, distinct from the other mark.  
Except as set forth in this Section 2, no rights or licenses are granted by 
Metra to Berlex.

     2.2  CONFLICT OF INTEREST.  Berlex warrants to Metra that Berlex does 
not currently represent or promote any product lines or products that compete 
with the Metra Products.


                                      -4-

                     [X] CONFIDENTIAL TREATMENT REQUESTED.
             OMITTED PORTIONS FILED SEPARATELY WITH THE COMMISSION.


<PAGE>

During the Term of this Agreement, Berlex shall not, without Metra's prior 
written consent, represent, promote, detail or otherwise try to sell any 
product lines or products that  compete with products that are deemed or 
perceived to be competitive in the OB/GYN Market with the Metra Products 
covered by this Agreement or any densitometry products.  If a Berlex 
Affiliate acquires rights to competitive products, Berlex agrees that Berlex 
will not represent, promote, detail or otherwise try to sell any such product 
lines or products.  Further, for a period of [XXXX] from the commencement of 
the first Promotional Year for the Pyrilinks-Registered Trademark--D Product, 
Berlex and Metra will not detail and/or promote bone measurement systems to 
the OB/GYN Market in the U.S.

     2.3  RIGHT TO PROMOTE INTERNATIONALLY.  From time to time the parties 
shall consider whether it would be appropriate for Berlex or a Berlex 
Affiliate to promote the Metra Products internationally.  Berlex acknowledges 
and agrees that Metra shall have the sole right to determine whether Metra 
will grant Berlex any international promotional rights.

     2.4  PROMOTION OF METRA'S QUS-2 ULTRASOUND PRODUCT.  In the event Metra 
identifies a distribution partner for the QUS-2 product and said distribution 
partner desires to promote and sell the product to the OB/GYN Market, Berlex 
agrees that Metra may appoint one distributor so long as said distributor 
does not and will not during the period that Berlex is promoting the QUS-2 
Ultrasound Product distribute menopausal and/or osteoporosis products that 
compete with Berlex's own products that are marketed to the OB/GYN Market; 
PROVIDED, FURTHER, that if the one distributor Metra will appoint is a 
distinct business unit of a pharmaceutical company and the distinct business 
unit does not distribute or promote menopausal and/or osteoporosis products 
that compete with Berlex's own products that are marketed to the OB/GYN 
Market, then Metra shall have the right to appoint the distinct business unit 
as the distributor so long as the agreement with the distributor does not 
impair Berlex's rights hereunder and precludes the distinct business unit 
from promoting menopausal and/or osteoporosis products to the OB/GYN Market 
in connection with any Metra Products.  In addition, Metra agrees to work 
with Berlex and the distributor to make the marketing messages synergistic.  
Prior to executing a definitive agreement with a distributor, Metra agrees to 
inform Berlex of the identity of the distributor and afford Berlex an 
opportunity to discuss with Metra the appointment of the distributor.

     2.5  RIGHT TO PROMOTE ADDITIONAL METRA PRODUCTS.  Metra agrees to 
provide Berlex with semi-annual updates concerning its clinical and 
regulatory progress with its [XXXX] and future bone resorption products.  
Metra will notify Berlex of the submission for FDA clearance for each product 
within thirty (30) days thereof.  Subject to Section 2.1(ii) above, Berlex 
shall have the right, upon ninety (90) days prior written notice to Metra, to 
add the above referenced Metra products to EXHIBIT A, so long as Berlex 
commits to provide reasonable promotional efforts equivalent to those 
required for existing Metra Products.

     2.6  METRA OWNERSHIP.  Metra shall retain all ownership rights in and to 
the Metra Intellectual Property Rights (including Metra Trademarks).  Berlex 
will assist Metra in every reasonable way, at Metra's expense, to obtain, 
secure, perfect, maintain, defend and enforce for Metra's benefit all Metra's 
Intellectual Property Rights, provided that Berlex shall not be required to 
become a party to litigation. 


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                       ARTICLE 3:  OBLIGATIONS OF BERLEX

     3.1  PROMOTION. Berlex shall use reasonable commercial efforts to 
promote the Metra Products in the U.S., commencing as soon as feasible after 
the Effective Date.  In carrying out the promotion of the Metra Products, 
Berlex shall use the same channels and methods, exercise the same diligence, 
and adhere to be same standards that Berlex employs with respect to Berlex's 
own female health care products accorded the same promotional/detailing 
position set forth in Section 3.1.1 below.  Berlex's promotion of the Metra 
Products will be directed toward the same audience as Berlex's promotional 
message for its Climara-Registered Trademark- product (for purposes of this 
Agreement, references to Climara-Registered Trademark- shall always include 
any subsequent or replacement product that has an estrogen replacement 
therapy indication).  Unless agreed to by the Commercialization Committee, 
Berlex is not required by this Agreement to design novel promotional efforts 
or materials for the Metra Products, or address promotional efforts toward 
any audience or by any mechanism that Berlex would not otherwise address or 
utilize in the ordinary course of promoting Berlex's Climara-Registered 
Trademark- product.

     3.1.1  PROMOTION [XXXX].  During the [XXXX] following commencement by 
Berlex of the promotion of Metra Products, Berlex shall promote and "detail" 
to the OB/GYN Market in the U.S. the Metra Products other than the QUS-2 
Ultrasound Product [XXXX].  During the [XXXX] following commencement by 
Berlex of the promotion of the QUS-2 Ultrasound Product, Berlex shall promote 
and "detail" to the OB/GYN Market in the U.S. the QUS-2 Ultrasound Product 
[XXXX].  For purposes of this Agreement, "detailing" [XXXX] and [XXXX] shall 
mean using the qualified Berlex direct pharmaceutical detailing personnel 
assigned to conduct detailing in the OB/GYN Market in the ordinary course of 
Berlex's business to conduct face-to-face meetings with individual physicians 
or other appropriate health care provider users of the Metra Products in the 
OB/GYN Market, which physicians and other appropriate healthcare providers 
Berlex would call on in the ordinary course of Berlex's business in promoting 
Berlex's Climara-Registered Trademark- product, where the Metra Products and 
their diagnostic use are presented [XXXX].  Following the [XXXX] referred to 
above, Berlex shall continue to use reasonable commercial efforts to promote 
and detail Metra's Products to the audience described above as appropriate to 
support the expanding market opportunity.  If Berlex's direct pharmaceutical 
detailing personnel assigned to the OB/GYN Market as of the Effective Date 
has a reduction in force of greater than fifteen percent (15%) for any reason 
whatsoever (which may include reassignment, loss due to unforeseen business 
events, etc.), then Berlex shall immediately notify Metra of such and the 
parties shall meet within thirty (30) days of Metra's receipt of such notice 
to discuss revisions to this Agreement, including, but not limited to the 
financial terms of the Agreement.

     3.1.2  PUBLICATIONS, TRADE SHOWS AND PHYSICIAN GROUPS.  Subject to 
obtaining necessary FDA clearances, if any, (a) Berlex shall promote the 
Metra Products in OB/GYN market trade publications within the U.S., provided 
that (i) the clinical information relating to the applicable Metra Product 
that is included in the trade publication was developed using the Metra 
Product together with a Berlex product; (ii) Berlex would place the 
promotional message in the applicable trade publication in the ordinary 
course of Berlex's business as part of its promotional efforts for the Berlex 
Climara-Registered Trademark- product; and (iii) the Commercialization 
Committee, determines 


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that the inclusion of information relating to one or more of the Metra 
Products is appropriate from a marketing standpoint for inclusion in the 
promotional message for the Berlex product; (b) Subject to obtaining 
necessary FDA clearances, if any, Berlex shall promote Metra Products at 
trade shows and introduce the Metra Products to hospitals, medical centers, 
physician groups and other appropriate health care provider users in the 
OB/GYN Market in the U.S. where Metra may want to establish education 
programs with respect to one or more Metra Products, provided that Berlex is 
present at such trade shows or calls upon such hospitals, medical centers, 
physician groups, and other appropriate health care provider users in the 
ordinary course of Berlex's business as part of its promotional efforts for 
the Berlex Climara-Registered Trademark- product.

     3.1.3  DETAILING MATERIALS.  Berlex shall prepare materials to be used 
by Berlex direct pharmaceutical detailing personnel for use in detailing the 
Metra Products to the OB/GYN Market.  Berlex shall not be required to create 
novel promotional material for use in promoting the Metra Products.  Subject 
to obtaining necessary FDA clearances, if any, Berlex's obligations under 
this Section shall be satisfied by (i) the addition of existing Metra 
promotional claims and other existing Metra material (including any claims 
added from time to time and any future Metra material), as the 
Commercialization Committee determines to be appropriate, to Berlex 
promotional materials created in the ordinary course of Berlex's business for 
Berlex's promotional efforts for the Berlex Climara-Registered Trademark- 
product; or (ii) the use of existing or future Metra promotional material.  
Berlex shall submit promotional materials containing information on Metra 
Products to the Commercialization Committee for review and discussion.  It is 
the intent of the parties that such review and discussion will be concluded 
promptly so as not to delay production and use of Berlex promotional 
materials.  Disagreements concerning the content of promotional material 
relating to Metra Products shall be resolved by the Commercialization 
Committee accepting the Metra position.  Disagreements concerning the content 
of promotional material relating to Berlex products shall be resolved by the 
Commercialization Committee accepting the Berlex position.  Information in 
Berlex promotional materials relating to Metra Products shall be consistent 
with applicable law and promotional materials used by Metra in connection 
with such Metra Products.  Berlex shall deliver to Metra copies of all final 
promotional materials used in connection with the detailing of Metra 
Products.  Metra shall not refer to Berlex or Berlex products in Metra 
product advertising without the express consent of Berlex, which shall not be 
unreasonably withheld.

     3.1.4  CUSTOMER REPORTING.  Consistent with Berlex's own detailing 
reporting practices, Berlex shall (i) assist Metra in assessing requirements of 
customers of Metra Products, including modifications and improvements thereto, 
in terms of quality, design, functional capability, and other features; and 
(ii) as reasonably requested by Metra, share with Metra on a quarterly basis, 
market research information that Berlex collects and generates in the ordinary 
course of its business for Berlex's female health care products and which 
provides useful market information about competition and changes in the market 
for one or more of the Metra Products, provided, however, that Berlex shall not 
be required to collect data or generate reports for Metra that Berlex does not 
collect or generate for itself in the ordinary course of Berlex's business; 
purchase market research or reports for Metra; or provide to Metra market 
research information on any Berlex product.


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     3.1.5  AUDITS.  Metra shall have the right, through an independent firm 
reasonably acceptable to Berlex, at Metra's expense, to audit Berlex's 
promotional and detailing activities in regard to the Metra Products 
(including to confirm that Metra Products are being promoted and detailed 
[XXXX] when required by the terms of this Agreement), by the following 
methods:  (i) to accompany from time to time, upon reasonable advance notice 
to Berlex, a representative sample of Berlex direct pharmaceutical detailing 
personnel assigned to the OB/GYN Market on physician/office visits; and (ii) 
to have the independent firm interview randomly selected OB/GYN physicians.  
Berlex shall be supplied with a copy of any report issued by such independent 
firm in regard to Berlex's activities pursuant to this Agreement (so long as 
Metra is not contractually prohibited from providing said materials to 
Berlex). Berlex shall not be required to make available to Metra a list of 
physicians called on by Berlex representatives; PROVIDED, HOWEVER, that once 
per year Berlex shall provide Metra access to any detailing reports prepared 
by Berlex direct pharmaceutical detailing personnel assigned to the OB/GYN 
Market.  To the extent Berlex receives in the ordinary course of business any 
market survey, market spending analysis or promotional audits in each case, 
relating to the OB/GYN Market, and Berlex is not contractually prohibited 
from providing said materials to Metra, then Berlex shall do so (such 
materials may from time to time require a financial contribution from Metra 
with the prior consent of Metra).

               ARTICLE 4.  ADDITIONAL OBLIGATIONS OF METRA

     4.1  METRA SUPPORT.  Metra shall promptly provide Berlex with Metra's 
core materials relating to promotion of the Metra Products.  Metra shall 
promptly respond to all reasonable inquiries from Berlex concerning matters 
pertaining to this Agreement.  In addition, Metra shall provide and 
participate in the development of the following:  (i) assistance with 
strategic marketing through the development, together with Berlex, of 
co-promotion programs; (ii) access, as appropriate, to clinical studies 
results for the Metra Products; (iii) development with Berlex of a managed 
care organization marketing plan; (iv) assistance with access to Metra's 
automated partners and central laboratory partners for market development; 
(v) access to Metra's proprietary marketing programs (such access may from 
time to time require a financial contribution from Berlex with the prior 
consent of Berlex); and (vi) access to Metra training materials which Berlex 
shall have right to adapt and duplicate at Berlex's expense (if adapted, only 
after the consent of Metra, which shall not be unreasonably withheld).  All 
of these activities and obligations of Metra will be administrated via the 
Commercialization Committee. 

               ARTICLE 5:  COMMERCIALIZATION COMMITTEE

     5.1  COMMERCIALIZATION COMMITTEE.  Metra and Berlex shall form a 
Commercialization Committee which shall meet to oversee the promotion of the 
Metra Products by Berlex and to review the overall success of the 
relationship.  During the first three (3) years following the Effective Date, 
the Commercialization Committee shall meet at least quarterly and thereafter 
shall meet as agreed to by Metra and Berlex.  Notwithstanding the preceding 
sentence, the parties currently contemplate that during the initial training 
phase, the Commercialization Committee may meet monthly.  Whenever possible, 
meetings will be scheduled in conjunction with trade shows attended by both 
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of up to two (2) representatives from each of Metra and Berlex.  Each party 
may have additional attendees as appropriate in view of the subject matter to 
be discussed.  At least one (1) of the representatives from each of Metra and 
Berlex shall have authority to resolve issues on the agenda.  Each party 
shall retain the rights, powers, and discretion granted to it under this 
Agreement, and the Commercialization Committee shall not be delegated or 
vested with any such rights, powers or discretion.  The Commercialization 
Committee shall not have the power to amend or modify this Agreement, which 
may only be amended or modified as provided in Section 11.2.  If the parties 
cannot reach agreement as to any issue coming before the Commercialization 
Committee, the issue shall be referred to senior executives of each party 
designated to decide Commercialization Committee issues and if such 
executives cannot reach agreement, then to the chief executive officers of 
Metra and Berlex, who (in the case of either the senior executives or the 
chief executive officers) shall meet within five (5) business days to resolve 
the issue.  In addition, so long as EXHIBIT A includes product(s) from 
Norland Medical Systems, Inc., an individual from Norland will be a member of 
the Commercialization Committee and Norland will have the right to vote on 
decisions that relate to the Norland products.

     5.2  COSTS.  Each party shall pay its own travel and lodging expenses 
incurred in connection with the meetings of the Commercialization Committee, 
which meetings shall alternate between locations so as to balance travel 
requirements and expenses.  Each party shall use reasonable efforts to cause 
its respective representatives to attend all meetings.

                  ARTICLE 6:  BERLEX COMPENSATION

     6.1  PROMOTIONAL FEES.  In connection with the promotional activities to 
be performed by Berlex pursuant to the terms of this Agreement, Metra shall 
pay Berlex the following amounts by wire transfer with same day funds:

          (i)   $3,000,000 on December 31, 1997; for the first Promotional 
                Year, and 

          (ii)  [XXXX] on December 31, 1998; and for the second Promotional 
                Year, and

          (iii) [XXXX] on December 31, 1999; for the third Promotional Year.

If Berlex does not commence active detailing, on a national level, of the 
Pyrilinks-Registered Trademark--D Product by September 30, 1997, then each of 
the fees set forth above shall be delayed by one full calendar quarter, 
provided such delay is not due to any material act or material omission of 
Metra.  In addition, the payments set forth in this Section 6.1(ii) and 
6.1(iii) shall not be paid if, in the case of 6.1(ii), either party has 
terminated the Agreement within five (5) business days following completion 
of the first Promotional Year (defined below), and in the case of 6.1(iii), 
if either party has terminated the Agreement within five (5) business days 
following the completion of the second Promotional Year.


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     6.2  COMMISSION.  Metra shall pay Berlex the following commissions:

          6.2.1  BASELINE REVENUE.  For purposes of this Article 6, "Baseline 
Revenue" shall mean the Gross Revenues during the twelve (12) months 
preceding the month in which Berlex commences active detailing, on a national 
level, of a particular Metra Product.  Only Metra Gross Revenues in any given 
Promotional Year in excess of the Baseline Revenue shall be subject to the 
applicable commission set forth in this Article 6.  "Promotional Year" shall 
mean the twelve (12) month period commencing on the first day of the month in 
which Berlex commences active detailing, on a national level, of the 
applicable Metra Product being promoted by Berlex, and each consecutive 
twelve (12) month period thereafter during which Berlex promotion continues.  
After the commencement of the first Promotional Year, each subsequent 
Promotional Year is deemed to start on the anniversary of the first 
Promotional Year.  If any product added to EXHIBIT A has Gross Revenues of 
less than twelve (12) months prior to the Berlex detailing launch, then the 
Baseline Revenue shall be the actual Gross Revenues for such shorter period.  
The Baseline Revenue shall be applied to each successive Promotional Year of 
the contract such that in year two of the contract and each year thereafter, 
Berlex's right to receive commissions under this Article 6 shall not commence 
until the applicable Baseline Revenue has been exceeded.  For purposes of 
Sections 6.2.3, 6.2.4 and 6.2.5, the Baseline Revenue shall be deemed to be 
zero ($0) if Berlex commences active detailing, on a national level, of a 
particular Metra Product within sixty (60) days of Metra's launch of said 
Metra Product in the U.S. (Metra shall give Berlex thirty (30) days advance 
notice of its launch date).

     The parties anticipate that the first Metra Product promoted by Berlex 
will be the Pyrilinks-Registered Trademark--D Product.  If Berlex initiates 
promotional efforts for any Metra Product other than the Pyrilinks-Registered 
Trademark--D Product in any month that is not the first month of the 
Promotional Year for the Pyrilinks-Registered Trademark--D Product, then the 
first year of promotion shall be considered a Short Promotional Year for that 
Metra Product which shall terminate at the end of the month preceding the 
first month of the next Promotional Year for the Pyrilinks-Registered 
Trademark--D Product and for which the following adjustment to the commission 
calculation shall occur; (1) if there is no Baseline Revenue, then the 
applicable commission shall be applied at the end of the Short Promotional 
Year; or (2) if there is a Baseline Revenue, and such Baseline Revenue is for 
a period of months longer than the Short Promotional Year, then the Baseline 
Revenue shall be adjusted by dividing the number of months in the Baseline 
Revenue by the number of months in the Short Promotional Year, with the 
resulting percentage applied to the Baseline Revenue to develop a short 
period Baseline Revenue.  Thereafter the Promotional Year for the applicable 
Metra Product shall be the same as the Promotional Year for the 
Pyrilinks-Registered Trademark--D Product.

          6.2.2  PYRILINKS-Registered Trademark--D.  A commission equal to 
[XXXX] of Metra's Gross Revenues for Pyrilinks-Registered Trademark--D in 
excess of Baseline Revenue.

          6.2.3  METRA'S POINT-OF-CARE CASSETTE.  A commission equal to [XXXX]
 of Metra's Gross Revenues for Metra's point-of-care cassette (which 
incorporates the Pyrilinks-Registered Trademark--D technology) product in 
excess of the Baseline Revenue.

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          6.2.4  QUS-2 ULTRASOUND PRODUCT.  A commission equal to [XXXX] of 
Metra's Gross Revenues for the QUS-2 product in excess of the Baseline 
Revenue.

          6.2.5  OTHER PRODUCTS.  If other products are added to EXHIBIT A, a 
commission equal to [XXXX] of Metra's Gross Revenues for such other product 
in excess of the Baseline Revenue.  With respect to [XXXX] and future bone 
resorption markers that Metra may from time-to-time license from third 
parties, the parties agree to discuss at that time any necessary adjustment 
to the definition of Gross Revenues for these products, to the extent that 
deductions for technology license royalties by Metra may be required to 
exceed [XXXX].

          6.2.6  COMMISSION PAYMENTS.  Commissions shall be calculated on an 
annual basis and shall be paid no later than sixty (60) days after Metra year 
end close.  Upon completion of the third Promotional Year and when all Metra 
obligations concerning the fixed payments in Section 6.1 have been fulfilled, 
for subsequent Promotional Years the commission shall be calculated on a 
quarterly basis and paid within sixty (60) days after the end of the quarter.

          6.2.7  REPORTS. Metra shall furnish to Berlex a quarterly written 
report (within 60 days following the end of the quarter) which includes:  (i) 
Metra Products sold; (ii) the gross revenues of each Metra Product; (iii) any 
payments made by Metra to third-party licensors relating to the Metra 
Products.  Such reports shall be due together with any commissions then due. 
All information provided by the parties under this Section 6.2.6 shall be 
Confidential Information.

          6.2.8  RECORDS AND AUDIT. Upon reasonable notice to Metra but no 
more than once per year, Berlex shall have the right to have an independent 
certified public accountant, selected by Berlex and acceptable to Metra, 
audit Metra's records, during normal business hours, to verify the 
commissions payable pursuant to this Agreement; PROVIDED, HOWEVER, that such 
audit shall not cover such records for more than the preceding three (3) 
years.  Such audit shall be at the expense of Berlex. Metra shall preserve 
and maintain all such records and accounts required for audit for a period of 
two (2) years after the year to which such records and accounts apply.  In 
any event, the auditor shall only disclose to Berlex the results of such 
audit and none of the data upon which such audit results are based, which 
audit results shall be treated by the auditor and Berlex as Confidential 
Information subject to the provisions of this Agreement.  If the audit shows 
an underpayment, the difference plus ten percent (10%) shall be promptly 
remitted to Berlex.  If the underpayment is greater than one-hundred thousand 
dollars ($100,000), then Metra shall pay Berlex's reasonable out-of-pocket 
audit fees.

     6.3  WARRANT(S).  On the Effective Date, Metra shall issue to Berlex a 
Common Stock Purchase Warrant in the form set forth on EXHIBIT B.  In the 
event this Agreement has not been terminated by either party within five (5) 
business days following completion of the first Promotional Year of the 
Pyrilinks-Registered Trademark--D Product, then on the sixth (6th) business 
day of the second 


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Promotional Year of the Pyrilinks-Registered Trademark--D Product, Metra 
shall issue to Berlex an additional Common Stock Purchase Warrant in the form 
set forth on EXHIBIT C. 

                               ARTICLE 7:  TERM 

     7.1  TERM.  The Term of this Agreement shall commence as of the 
Effective Date and shall continue in effect until terminated by one of the 
parties by providing written notice of such termination to the other party in 
accordance with this Section 7.1 or Sections 7.2, 7.3, or 7.4.  Either party 
shall have the right to terminate this Agreement pursuant to this Section 7.1 
by providing ninety (90) days advance written notice of such termination to 
the other party; PROVIDED, HOWEVER, that Berlex shall not exercise its right 
to terminate this Agreement pursuant to this Section 7.1 prior to the 
completion of the third Promotional Year of the Pyrilinks-Registered 
Trademark--D Product (the "Third Anniversary Date"); and FURTHER PROVIDED 
that Metra shall not exercise its right to terminate this Agreement pursuant 
to this Section 7.1 prior to the expiration of the later to expire of the 
following periods:  (i) the completion of the Third Anniversary Date; or (ii) 
the completion of the second full Promotional Year of the QUS-2 Ultrasound 
Product.  Section 7.1(ii) shall cease to be a binding obligation of Metra if 
either of the following events shall occur: U.S. development and approval 
efforts for the QUS-2 Ultrasound Product (or a replacement product) 
permanently cease without such product having been approved for commercial 
sale in the U.S.; or Metra shall make a [XXXX] payment to Berlex by wire 
transfer within five (5) days of the delivery by Metra to Berlex of Metra's 
notice terminating the Agreement.

     If, following the Third Anniversary Date, Metra terminates this 
Agreement pursuant to this Section 7.1, then for [XXXX] following such 
termination Metra shall not enter into an agreement with a pharmaceutical 
company permitting a pharmaceutical company to promote any of the Metra 
Products to the OB/GYN Market in the U.S. except as provided hereafter.  If 
Metra wishes, during this [XXXX] period to enter into an agreement with a 
pharmaceutical company relating to the promotion of Metra Products to the 
OB/GYN Market in the U.S.,  Berlex shall have a right of first refusal to 
promote the Metra Products to the OB/GYN Market in the U.S. if Berlex agrees 
to execute a binding commitment to meet or exceed the business terms offered 
by the pharmaceutical company.  Berlex shall be required to make a binding 
commitment to Metra within fifteen (15) business days following receipt from 
Metra of a summary of the material business terms offered by the 
pharmaceutical company (Metra shall not be obligated to disclose to Berlex 
the name of the pharmaceutical company but Metra shall inform Berlex whether 
the pharmaceutical company distributes menopausal and/or osteoporosis 
products that compete with Berlex's own products that are marketed to the 
OB/GYN Market).  If Berlex does not execute a binding commitment within said 
fifteen (15) business days, Metra shall thereafter be free to enter into an 
agreement with a pharmaceutical company on business terms no less favorable 
to Metra than those disclosed to Berlex.  Berlex's right of first refusal 
shall not apply if Metra enters into a promotion agreement with a distinct 
business unit of a pharmaceutical company and the distinct business unit does 
not and will not during the [XXXX] period referred to above in this paragraph 
distribute or promote products that compete with Berlex's own products 
marketed to the OB/GYN Market.


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     7.2  EARLY TERMINATION.  Either party may terminate this Agreement upon 
written notice in the event of (i) any material breach of any warranty, 
representation or covenant of this Agreement by the other party which remains 
uncured thirty (30) days after notice of such breach, or (ii) in the event of 
any bankruptcy, insolvency, receivership or similar proceeding of the other 
party which continues for sixty (60) days from filing.

     7.3  TERMINATION BY METRA.  Metra may terminate this Agreement upon 
written notice delivered to Berlex within five (5) business days following 
completion of the first Promotional Year for the Pyrilinks-Registered 
Trademark--D Product if, during the four calendar quarters of the first 
Promotional Year (the parties expect that the fourth quarter shall end on 
approximately June 30, 1998), (i) Metra's Gross Revenues of 
Pyrilinks-Registered Trademark--D for the four quarters do not equal or 
exceed [XXXX]; and (ii) Metra's Gross Revenues of Pyrilinks-Registered 
Trademark--D for any individual quarter do not equal or exceed [XXXX].  In 
addition, Metra may terminate this Agreement upon written notice delivered to 
Berlex within five (5) business days following completion of the second 
Promotional Year for the Pyrilinks-Registered Trademark--D Product if, during 
the second Promotional Year (the parties expect that the second Promotional 
Year shall end on approximately June 30, 1999), Metra's Gross Revenues of 
Pyrilinks-Registered Trademark--D for the four quarters do not equal or 
exceed [XXXX].  For purposes of this paragraph and calculating the dollar 
thresholds referred to above, if Metra is providing Metra Products to the 
OB/GYN Market in the U.S. at no charge and in quantities not in Metra's 
ordinary course of business, the parties shall meet to review this practice 
and discuss whether these marketing units should be considered in the dollar 
thresholds.

     Metra and Berlex agree to meet during the third quarter and, if this 
Agreement is not sooner terminated, the seventh quarter following the 
commencement of the first Promotional Year for the Pyrilinks-Registered 
Trademark--D Product, to discuss the sales performance of the Metra Products 
and Metra agrees that if it is possible that Metra will have the right to 
terminate this Agreement pursuant to this Section 7.3, then Metra will notify 
Berlex in writing of Metra's intent to terminate the Agreement.  Berlex shall 
have thirty (30) days from receipt of the notice from Metra to inform Metra 
that either (i) Berlex accepts the Metra termination notice, in which case 
this Agreement will terminate; or (ii) Berlex rejects the Metra termination 
notice, in which case (a) this Agreement will not terminate pursuant to this 
Section 7.3; and (b) any payments for the upcoming Promotional Year due from 
Metra to Berlex pursuant to Section 6.1 shall be reduced in the same 
proportion that Metra's total sales for the applicable period of four full 
quarters bears to the sales target for such period, as set forth above in 
this Section 7.3.  In addition, Metra shall have the right to terminate this 
Agreement upon written notice to Berlex if Berlex has not begun active 
detailing of the Pyrilinks-Registered Trademark--D product within twelve (12) 
months of the Effective Date, provided that such failure to detail on the 
part of Berlex is not due in whole or in part to any material act or material 
omission of Metra.

     In the event that Metra terminates this Agreement pursuant to this 
Section 7.3, then for [XXXX] following such termination Metra shall not enter 
into an agreement with a pharmaceutical company permitting a pharmaceutical 
company to promote any of the Metra Products to the OB/GYN Market in the U.S. 
except as provided hereafter.  If Metra wishes, during this [XXXX] period to 
enter into an agreement with a pharmaceutical company relating to the 
promotion of Metra Products to the OB/GYN Market in the U.S.,  Berlex shall 
have a right of 


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first refusal to promote the Metra Products to the OB/GYN Market in the U.S. 
if Berlex agrees to execute a binding commitment to meet or exceed the 
business terms offered by the pharmaceutical company.  Berlex shall be 
required to make a binding commitment to Metra within fifteen (15) business 
days following receipt from Metra of a summary of the material  business 
terms offered by the pharmaceutical company (Metra shall not be obligated to 
disclose to Berlex the name of the pharmaceutical company).  If Berlex does 
not execute a binding commitment within said fifteen (15) business days, 
Metra shall thereafter be free to enter into an agreement with a 
pharmaceutical company on business terms no less favorable than those 
disclosed to Berlex.  Berlex's right of first refusal shall not apply if 
Metra enters into a promotion agreement with a distinct business unit of a 
pharmaceutical company and the distinct business unit does not and will not 
during the [XXXX] period referred to above in this paragraph distribute or 
promote products that compete with Berlex's own products marketed to the 
OB/GYN Market.

     7.4  TERMINATION BY BERLEX.  Berlex may terminate this Agreement upon 
ninety (90) days prior written notice:  (i) if, after completion of the first 
Promotional Year for the Pyrilinks-Registered Trademark--D Product, Berlex 
acquires rights to a pharmaceutical product that is marketed primarily to the 
OB/GYN Market and Berlex desires to devote its personnel to that product 
rather that the Metra Products; or (ii) if (A) Cholestech Corporation has not 
achieved U.S. 510(k) clearance to market Metra's point-of-care cassette by 
[XXXX] or (B) Cholestech Corporation has not received CLIA waiver for Metra's 
point-of-care cassette by [XXXX]; or (iii) if, within thirty (30) days of the 
Effective Date, Metra has not entered into an agreement with Norland Medical 
Systems, Inc. pursuant to which Berlex has the right to promote the Norland 
products set forth in EXHIBIT A on the terms set forth in this Agreement.

     7.5  RETURN OF INFORMATION.  Within thirty (30) calendar days after the 
termination or expiration of this Agreement, each party hereto shall either 
deliver to the other, or destroy, all copies of any tangible Confidential 
Information of the other party provided hereunder in its possession or under 
its control, and shall furnish to the other party an affidavit signed by an 
officer of its company certifying that to the best of its knowledge, such 
delivery or destruction has been fully effected.  Each parties' outside 
counsel may retain one copy of the Confidential Information in a sealed file.

     7.6  REMAINING PAYMENT.  Within forty-five (45) calendar days of the 
expiration or termination of this Agreement, each party shall pay to the 
other all sums, if any, due and owing as of the date of expiration or 
termination.  Such sums shall include any Berlex commissions then earned and 
unpaid.

     7.7  SURVIVAL.  The respective rights and obligations of the parties 
under Sections 6.2.8 (which shall only survive six (6) months), 7.1, 7.3, 
7.5, 7.6, 7.7, Article 8, Article 10 and Article 11 shall survive expiration 
or termination of this Agreement.  No termination or expiration of this 
Agreement shall relieve any party for any liability for any breach of or 
liability accruing under this Agreement prior to termination. 


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                      ARTICLE 8:  CONFIDENTIAL INFORMATION 

     8.1  PROTECTION OF CONFIDENTIAL INFORMATION.  The parties recognize 
that, in connection with the performance of this Agreement, each of them may 
disclose to the other its Confidential Information.  The party receiving any 
Confidential Information agrees to maintain the confidential status of such 
Confidential Information and not to use any such Confidential Information for 
any purpose other than the purpose for which it was originally disclosed to 
the receiving party, and not to disclose any of such Confidential Information 
to any third party.  Neither party shall disclose the other's Confidential 
Information to its employees and agents except on a need-to-know basis.

     8.2  PERMITTED DISCLOSURE.  The parties acknowledge and agree that each 
may disclose Confidential Information:  (i) as required by law; (ii) to their 
respective directors, officers, employees, attorneys, accountants, 
advertising agencies, medical education providers, public relations agencies 
and other advisors, who are under an obligation of confidentiality, on a 
"need-to-know" basis; (iii) to partners, who are under an obligation of 
confidentiality, on a "need-to-know" basis; or (iv) in connection with 
disputes or litigation between the parties involving such Confidential 
Information and each party shall endeavor to limit disclosure to that purpose 
and to ensure maximum application of all appropriate judicial safeguards 
(such as placing documents under seal).  In the event a party is required to 
disclose Confidential Information as required by law, such party will, to the 
extent practical, in advance of such disclosure, provide the other party with 
prompt notice of such requirement.  Such party also agrees, to the extent 
legally permissible, to provide the other party, in advance of any such 
disclosure, with copies of any information or documents such party intends to 
disclose (and, if applicable, the text of the disclosure language itself) and 
to cooperate with the other party to the extent the other party may seek to 
limit such disclosure.

     8.3  APPLICABILITY.  The foregoing obligations of confidentiality shall 
apply to directors, officers, employees and representatives of the parties 
and any other person to whom the parties have delivered copies of, or 
permitted access to, such Confidential Information in connection with the 
performance of this Agreement, and each party shall advise each of the above 
of the obligations set forth in this Article 8.

     8.4  THIRD PARTY CONFIDENTIAL INFORMATION.  Any Confidential Information 
of a third party disclosed to either party shall be treated by Berlex or 
Metra, as the case may be, in accordance with the terms under which such 
third party Confidential Information was disclosed; PROVIDED, HOWEVER, that 
the party disclosing such third party Confidential Information shall first 
notify the other party that such information constitutes third party 
Confidential Information and the terms applicable to such third party 
Confidential Information and provided further that either party may decline, 
in its sole discretion, to accept all or any portion of such third party 
Confidential Information.

     8.5  CONFIDENTIALITY OF AGREEMENT.  Except as required by law or 
generally accepted accounting principles, and except to assert its rights 
hereunder or for disclosures to its own officers, directors, employees and 
professional advisers on a need-to-know basis or in confidence 


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to investment bankers, financial institutions or other lenders or acquirers, 
each party hereto agrees that neither it nor its directors, officers, 
employees, consultants or agents shall disclose the terms of this Agreement 
or specific matters relating hereto without the prior consent of the other 
party, which consent shall not be unreasonably withheld or delayed. Berlex 
and Metra shall mutually agree to the form of a joint press release to be 
issued on the Effective Date.

     8.6  USE OF NAME.  Neither party shall use the name of the other or the 
name of the Affiliates of the other party or the names of the products of the 
other party in any public announcement, without the consent of the other 
party.  Metra will not use the name of Berlex's Affiliate, Schering AG 
Germany in any public announcement without the consent of Schering AG Germany.

                 ARTICLE 9:  REPRESENTATIONS AND WARRANTIES 

     9.1  MUTUAL REPRESENTATIONS AND WARRANTIES. Each party represents and 
warrants to the other party that:

          (i)  such party has been duly incorporated and is validly existing 
under the laws of the state in which such party is incorporated; 

          (ii)  such party has the full corporate right, power and authority 
to enter into this Agreement and to perform the acts required of it hereunder;

          (iii)  the execution of this Agreement by such party, and the 
performance by such party of its obligations and duties hereunder, do not and 
will not violate any agreement to which such party is a party or by which it 
is otherwise bound;

          (iv)  when executed and delivered by such party, this Agreement 
will constitute the legal, valid and binding obligation of such party, 
enforceable against such party in accordance with its terms; and

          (v)  such party acknowledges that the other party makes no 
representations, warranties or agreements related to the subject matter 
hereof that are not expressly provided for in this Agreement.

     9.2  BERLEX REPRESENTATIONS AND WARRANTIES.  In addition to the 
representations and warranties of Section 9.1 hereto, Berlex further 
represents and warrants:

          (i)  the non Metra promotional materials which Berlex includes in 
or associates with Metra Products do not and shall not, to the best of 
Berlex's knowledge, infringe on or violate any copyright, U.S. patent or any 
other proprietary right of any third party; and

          (ii)  Berlex's performance of this Agreement shall comply in all 
material respects with, and shall neither contravene, breach nor infringe, 
any laws or regulations of the U.S.


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     9.3  METRA REPRESENTATIONS AND WARRANTIES.  In addition to the 
representations and warranties of Section 9.1 hereto, Metra further 
represents and warrants:

          (i)  the Metra promotional materials do not and shall not, to the 
best of Metra's knowledge, infringe on or violate any copyright, U.S. patent 
or any other proprietary right of any third party;

          (ii)  Metra has sufficient right, title and ownership of all Metra 
Trademarks being licensed to Berlex pursuant to this Agreement, without 
infringement of the rights of third parties;

          (iii)  the Metra Products (for purposes of subparagraphs (iii), 
(iv) and (v) Metra Products means only those products set forth under 
subparagraph A of EXHIBIT A) (a) will conform to the claims set forth in 
applicable FDA clearances; (b) will not be adulterated or misbranded by Metra 
within the meaning of the U.S. Food, Drug and Cosmetic Act, or be an article 
which may not be introduced into U.S. interstate commerce pursuant to such 
act; and (c) that Metra will comply in all material respects with all 
applicable laws and regulations in the manufacture, storage, distribution and 
sale of the Metra Products, including without limitation compliance with 
applicable current good manufacturing practices regulations, and laws 
relating to the generation, storage, shipment and disposal of waste;

          (iv)  to the best of Metra's knowledge there are no claims or 
actions at law or equity of any nature pending or threatened against Metra by 
any third party (including without limitation any governmental authority) 
affecting any of the Metra Products or Metra's ability to perform this 
Agreement; and 

          (v)  except for existing rights granted to Wyeth-Ayerst 
Laboratories and Mission Pharmacal, Metra has not granted to any third party 
the right to promote or detail to the OB/GYN market in the U.S. any Metra 
Products.

          (vi)  Metra's performance of this Agreement shall comply in all 
material respects with, and shall neither contravene, breach nor infringe, 
any laws or regulations of the U.S. 

      ARTICLE 10:  LIMITATION OF LIABILITY; DISCLAIMER; INDEMNIFICATION 

     10.1  LIABILITY.  EXCEPT AS PROVIDED IN SECTION 10.3, UNDER NO 
CIRCUMSTANCES SHALL EITHER PARTY BE LIABLE TO THE OTHER PARTY FOR INDIRECT, 
INCIDENTAL, CONSEQUENTIAL, SPECIAL OR EXEMPLARY DAMAGES (EVEN IF THAT PARTY 
HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES), ARISING FROM ANY 
PROVISION OF THIS AGREEMENT, SUCH AS, BUT NOT LIMITED TO, LOSS OF REVENUE OR 
ANTICIPATED PROFITS OR LOST BUSINESS.

     10.2  NO ADDITIONAL WARRANTIES.  EXCEPT AS SET FORTH IN THIS AGREEMENT, 
NEITHER PARTY MAKES ANY, AND EACH PARTY HEREBY SPECIFICALLY DISCLAIMS ANY 
REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, 


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REGARDING THE PRODUCTS AND SERVICES CONTEMPLATED BY THIS AGREEMENT, INCLUDING 
ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 
AND IMPLIED WARRANTIES ARISING FROM COURSE OF DEALING OR COURSE OF 
PERFORMANCE.

     10.3  INDEMNIFICATION. 

          10.3.1  METRA INDEMNITY.  Subject to the limitations set forth 
below, Metra, at its own expense, shall indemnify, defend and hold Berlex and 
any Berlex Affiliates and their officers, directors, employees and agents 
(the "BERLEX INDEMNIFIED PARTY(IES)") harmless from and against any 
judgments, losses, deficiencies, damages, liabilities, costs and expenses 
(including, without limitation, reasonable attorneys' fees and expenses), 
whether required to be paid to a third party or otherwise incurred in 
connection with or arising from any claim, suit, action or proceeding 
(collectively, a "CLAIM") asserted by a third party (having no direct or 
indirect (including via an Affiliate) relationship with Berlex), against a 
Berlex Indemnified Party to the extent the basis of such Claim is that:  (i) 
the Metra Trademarks infringe any Intellectual Property Rights of a third 
party; (ii) Metra does not have the right to license the Metra Trademarks as 
set forth herein; and (iii) a material act or material omission of Metra 
(including without limitation the design, testing, manufacture, regulatory 
approval, sale, detailing (by Berlex or Metra), promoting (by Berlex or 
Metra), or distribution of any of the Metra Products), is alleged to have 
caused damage or injury to any third party.  Any Claim requiring Berlex to 
indemnify the Metra Indemnitees pursuant to Section 10.3.4 shall be excluded 
from Metra's indemnity undertaking set forth in this Section.

          10.3.2  NO METRA TRADEMARK LIABILITY.  Notwithstanding Section 
10.3.1, Metra assumes no liability for infringement claims arising from:  (i) 
a combination of the Metra Trademarks or Metra promotional materials or any 
part thereof with other Berlex or other third party materials not provided by 
Metra where such infringement would not have arisen from the use of the Metra 
Trademarks or materials or portion thereof absent such combination, and where 
the combination was not approved by Metra pursuant to Section 3.1.3; or (ii) 
modification of the Metra Trademarks or materials or portion thereof by 
anyone other than Metra or on its behalf where such infringement would not 
have occurred but for such modifications, and where such modification was not 
approved by Metra pursuant to Section 3.1.3.

          10.3.3  METRA TRADEMARK LIABILITY.  If Metra receives notice of an 
alleged infringement relating to the Metra Trademarks, Metra, at its option 
and expense, shall use all reasonable efforts to:  (i) obtain a license at no 
cost to Berlex permitting continued use of the Metra Trademarks on terms and 
conditions consistent with the rights granted to Berlex hereunder, (ii) 
modify the infringe portion of the Metra Trademarks so that it does not 
infringe third party rights; or (iii) provide a substitute for such 
infringing portion.  If none of the foregoing options are reasonably 
available to Metra, then upon written notice by Metra to Berlex, Berlex shall 
thereupon take the necessary action to discontinue further distribution of 
the Metra Trademarks to the extent that and only for so long as such use 
would be infringing.


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          10.3.4  BERLEX INDEMNIFICATION.  Subject to the limitations set 
forth below, Berlex, at its own expense, shall indemnify, defend and hold 
Metra and any Metra Affiliates and their officers, directors, employees and 
agents  (the "METRA INDEMNIFIED PARTY(IES)"  harmless from and against any 
judgment, losses, deficiencies, damages, liabilities, costs and expenses 
(including, without limitation, reasonable attorneys' fees and expenses), 
whether required to be paid to a third party or otherwise incurred in 
connection with or arising from any Claim asserted by a third party (having 
no direct or indirect (including via an Affiliate) relationship with Metra) 
against a Metra Indemnified Party to the extent the basis of such Claim is 
that: (i) a third party Claim arising from any promotional or detailing 
performed by Berlex in regard to any Berlex product, or in regard to any 
Metra Product if the information relating to the Metra Product was not 
approved by Metra pursuant to Section 3.1.3; or (ii) a Claim relating to any 
Berlex statements and/or claims regarding Metra Products different from those 
made by Metra in Metra's own promotional materials and/or in Metra's FDA 
clearances or Metra Product specifications unless the Berlex statements 
and/or claims were approved by Metra pursuant to Section 3.1.3.

          10.3.5  ASSERTION OF CLAIMS. Each indemnified party agrees to give 
the indemnifying party prompt written notice of any Claim or discovery of 
fact upon which such indemnified party intends to base a request for 
indemnification under Sections 10.3.1 or 10.3.4.  Each party shall furnish 
promptly to the other, copies of all papers and official documents received 
in respect of any Claim.  With respect to any Claim relating solely to the 
payment of money damages and which will not result in the indemnified party 
becoming subject to injunctive or other relief or otherwise adversely 
affecting the business of the indemnified party in any manner, and as to 
which the indemnifying party shall have acknowledged in writing the 
obligation to indemnify the indemnified party hereunder, the indemnifying 
party shall have the sole right to defend, settle or otherwise dispose of 
such Claim, on such terms as the indemnifying party, in its sole discretion, 
shall deem appropriate.  The indemnifying party shall obtain the written 
consent of the indemnified party, which shall not be unreasonably withheld, 
prior to ceasing to defend, settling or otherwise disposing of any Claim if 
as a result thereof the indemnified party would become subject to injunctive 
or other equitable relief or any remedy other than the payment of money, 
which payment would be the responsibility of the indemnifying party.  The 
indemnifying party shall not be liable for any settlement or other 
disposition of a Claim by the indemnified party which is reached without the 
written consent of the indemnifying party.  Except as provided above, the 
reasonable costs and expenses, including reasonable fees and disbursements of 
counsel incurred by any indemnified party in connection with any Claim, shall 
be reimbursed on a quarterly basis by the indemnifying party, without 
prejudice to the indemnifying party's right to contest the indemnified 
party's right to indemnification and subject to refund in the event the 
indemnifying party is ultimately held not to be obligated to indemnify the 
indemnified party. 


                        ARTICLE 11:  MISCELLANEOUS 

     11.1  GOVERNING LAW.  This Agreement shall be interpreted and construed 
in accordance with the laws of the State of California, with the same force 
and effect as if fully executed and performed therein.  Each of Berlex and 
Metra hereby consents and submits to the personal jurisdiction in the state 
courts of the State of California, and expressly agrees that the venue for 


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any action arising under this Agreement shall be the appropriate court 
sitting within the Northern District of California.

     11.2  AMENDMENT OR MODIFICATION.  This Agreement may not be amended, 
modified or supplemented by the parties in any manner, except by an 
instrument in writing signed on behalf of each of the parties by a duly 
authorized officer or representative.

     11.3  NO ASSIGNMENT.  Neither party shall transfer or assign any rights 
or delegate any obligations hereunder, in whole or in part, whether 
voluntarily or by operation of law, without the prior written consent of the 
other party.  Any purported transfer, assignment or delegation by either 
party without the appropriate prior written approval shall be null and void 
and of no force or effect.  Notwithstanding the foregoing, without securing 
such prior consent, each party shall have the right to assign this Agreement 
or any of its rights or obligations to any successor of such party by way of 
merger or consolidation or the acquisition of substantially all of the 
business and assets of the assigning party relating to the Agreement.

     11.4  NOTICES.  Except as otherwise provided herein, any notice or other 
communication to be given hereunder shall be in writing and shall be (as 
elected by the party giving such notice):  (i) personally delivered; (ii) 
transmitted by postage prepaid registered or certified airmail, return 
receipt requested; (iii) deposited prepaid with a nationally recognized 
overnight courier service; or (iv) sent via facsimile, with a confirmation 
copy sent via first class mail.  Unless otherwise provided herein, all 
notices shall be deemed to have been duly given on:  (x) the date of receipt 
(or if delivery is refused, the date of such refusal) if delivered 
personally, by courier, or by facsimile; or (y) five (5) days after the date 
of posting if transmitted by mail.  Either party may change its address for 
notice purposes hereof on not less than five (5) days prior notice to the 
other party.  Notice hereunder shall be directed to a party at the address 
for such party which is set forth below:

     To Metra:          Metra Biosystems, Inc.
                        265 North Whisman Road
                        Mountain View, California  94043
                        Attention:  George W. Dunbar, Jr., President and CEO
                        Fax:  (415) 903-0500

     Copy to:           Mark B. Weeks
                        Venture Law Group             
                        2800 Sand Hill Road           
                        Menlo Park, California  94025 
                        Fax: (415) 233-8386           

     To Berlex:         Berlex Laboratories, Inc.
                        300 Fairfield Road
                        Wayne, New Jersey 07470
                        Attention:  H. Joseph Reiser, Vice President 
                        Fax: (201) 942-1610


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     Copy to:           Berlex Laboratories, Inc.
                        300 Fairfield Road          
                        Wayne, New Jersey 07470    
                        Attention:  General Counsel 
                        Fax: (201) 305-4405         




     11.5  ENTIRE AGREEMENT.  Except for the nondisclosure agreement dated 
March 7, 1997, this Agreement represents the entire agreement of the parties 
with respect to the subject matter hereof and supersedes all prior and/or 
contemporaneous agreements and understandings, written or oral between the 
parties with respect to the subject matter hereof.

     11.6  WAIVER.  Any of the provisions of this Agreement may be waived by 
the party entitled to the benefit thereof.  Neither party shall be deemed, by 
any act or omission, to have waived any of its rights or remedies hereunder 
unless such waiver is in writing and signed by the waiving party, and then 
only to the extent specifically set forth in such writing.  A waiver with 
reference to one event shall not be construed as continuing or as a bar to or 
waiver of any right or remedy as to a subsequent event.

     11.7  FEES AND EXPENSES.  Each party shall be responsible for the 
payment of its own costs and expenses, including attorneys' fees and 
expenses, in connection with the negotiation and execution of this Agreement.

     11.8  RECOVERY OF COSTS AND EXPENSES.  If either party to this Agreement 
brings an action against the other party to enforce its rights under this 
Agreement, the prevailing party shall be entitled to recover its costs and 
expenses, including, without limitation, attorneys' fees and costs incurred 
in connection with such action, including any appeal of such action.

     11.9  SEVERABILITY.  If the application of any provision or provisions 
of this Agreement to any particular facts of circumstances shall be held to 
be invalid or unenforceable by any court of competent jurisdiction, then:  
(i) the validity and enforceability of such provision or provisions as 
applied to any other particular facts or circumstances and the validity of 
other provisions of this Agreement shall not in any way be affected or 
impaired thereby; and (ii) such provision or provisions shall be reformed 
without further action by the parties hereto and only to the extent necessary 
to make such provision or provisions valid and enforceable when applied to 
such particular facts and circumstances.

     11.10  OTHER AGREEMENTS.  Neither party shall agree to any contractual 
provision or term in any agreement with any third party which contains a 
provision or term which causes such party to be in breach of or violates this 
Agreement.

     11.11  NO DISCLOSURE.  Without the prior written consent of the other 
party, neither party shall, in any manner, disclose, advertise, or publish 
the terms of, or any information concerning, this Agreement; PROVIDED, 
HOWEVER, that either party may disclose such portions of this Agreement as 
may be required by law, subject to the provisions of Article 8 hereto.


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     11.12  NO THIRD PARTY BENEFICIARIES.  Nothing express or implied in this 
Agreement is intended to confer, nor shall anything herein confer, upon any 
person other than the parties and the respective successors or assigns of the 
parties, any rights, remedies, obligations or liabilities whatsoever.

     11.13  INDEPENDENT CONTRACTORS.  The relationship of Metra and Berlex 
established by this Agreement is that of independent contractors, and nothing 
contained in this Agreement shall be construed to give either party the power 
to direct and control the day-to-day activities of the other or allow one 
party to create or assume any obligation on behalf of the other for any 
purpose whatsoever.  All financial obligations associated with Berlex's 
business are the sole responsibility of Berlex.  All sales and other 
agreements between Berlex and Berlex's customers are Berlex's exclusive 
responsibility and shall have no effect on Berlex's obligations under this 
Agreement. All financial obligations associated with Metra's business are the 
sole responsibility of Metra.  All sales and other agreements between Metra 
and Metra's customers are Metra's exclusive responsibility and shall have no 
effect on Metra's obligations under this Agreement.

     11.14  COUNTERPARTS; FACSIMILES.  This Agreement may be executed in any 
number of counterparts, each of which when so executed and delivered shall be 
deemed an original, and such counterparts together shall constitute one and 
the same instrument.  Each party shall receive a duplicate original of the 
counterpart copy or copies executed by it.  For purposes hereof, a facsimile 
copy of this Agreement, including the signature pages hereto, shall be deemed 
to be an original.  Notwithstanding the foregoing, the parties shall each 
deliver original execution copies of this Agreement to one another as soon as 
practicable following execution thereof.


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     IN WITNESS WHEREOF, the parties to this Agreement by their duly 
authorized representatives have executed this Agreement as of the date first 
above written.

METRA BIOSYSTEMS, INC.                      BERLEX LABORATORIES, INC.

By: /s/ Kurt E. Amundson                    By: /s/ John Nicholson
    ---------------------------                 ------------------------------
    Name:  Kurt E. Amundson                     Name:  John Nicholson
    Title:  Vice President & CFO                Title:  Treasurer


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                                  EXHIBIT A

                                METRA PRODUCTS

A.  PRODUCTS SUBJECT TO ARTICLE 6 COMMISSIONS.

    1.  Pyrilinks-Registered Trademark--D (all formats).

    2.  Metra's point-of-care cassette (manufactured pursuant to Metra's 
agreement with Cholestech Corporation).

    3.  QUS-2 Ultrasound product.

B.  PRODUCTS NOT SUBJECT TO ARTICLE 6 COMMISSIONS.

    1.  Norland Medical Systems, Inc.'s pDEXA and OsteoAnalyzer products.


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                                   EXHIBIT B

                        FORM OF COMMON STOCK WARRANT

THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS 
AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND HAS BEEN 
ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE 
SALE OR DISTRIBUTION THEREOF.  NO SUCH SALE OR DISPOSITION MAY BE EFFECTED 
WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF 
COUNSEL, REASONABLY SATISFACTORY TO THE COMPANY, THAT SUCH REGISTRATION IS 
NOT REQUIRED UNDER THE SECURITIES ACT.

Warrant No. WC-1                               Number of Shares:  413,223
Date of Issuance:  April 25, 1997              (subject to adjustment)


                            METRA BIOSYSTEMS, INC.

                         COMMON STOCK PURCHASE WARRANT

     Metra Biosystems, Inc. (the "COMPANY"), for value received, hereby 
certifies that Berlex Laboratories, Inc., or its registered assigns (in 
accordance with Section 4 below) (the "REGISTERED HOLDER"), is entitled, 
subject to the terms set forth below, to purchase from the Company, at any 
time after the Date of Issuance (set forth above) and on or before the 
Expiration Date (as defined in Section 6 below), up to that number of shares 
of Common Stock of the Company as shall be determined pursuant to Section 2 
below, at an exercise price per share as shall also be determined pursuant to 
Section 2.  The shares purchasable upon exercise of this Warrant are 
hereinafter referred to as the "WARRANT STOCK." The exercise price per share 
of Warrant Stock is hereinafter referred to as the "PURCHASE PRICE."

     1.  EXERCISE.

         (a)  MANNER OF EXERCISE.  This Warrant may be exercised by the 
Registered Holder, in whole or in part, by surrendering this Warrant, with 
the purchase form appended hereto as EXHIBIT A duly executed by such 
Registered Holder or by such Registered Holder's duly authorized 
attorney-in-fact, at the principal office of the Company, or at such other 
office or agency as the Company may designate, accompanied by payment in full 
by cash, check or wire transfer of the Purchase Price payable in respect of 
the number of shares of Warrant Stock purchased upon such exercise.

         (b)  EFFECTIVE TIME OF EXERCISE.  Each exercise of this Warrant 
shall be deemed to have been effected immediately prior to the close of 
business on the day on which this Warrant shall have been surrendered to the 
Company, with payment of the applicable Purchase Price, as provided in 
Section 1(a) above; provided, however, that if this Warrant is exercised in 


<PAGE>

connection with or in contemplation of an Acquisition (as defined in Section 
6 below), such exercise may be conditioned upon the closing of such 
Acquisition, in which case this Warrant shall be deemed to have been 
exercised immediately prior to such closing and, if such closing does not 
occur, this Warrant shall be deemed to not have been exercised.  At such 
time, the person or persons in whose name or names any certificates for 
Warrant Stock shall be issuable upon such exercise as provided in Section 
1(c) below shall be deemed to have become the holder or holders of record of 
the Warrant Stock represented by such certificates.

         (c)  DELIVERY TO REGISTERED HOLDER.  As soon as practicable after 
the exercise of this Warrant in whole or in part, and in any event within 
twenty (20) days thereafter, the Company at its expense will cause to be 
issued in the name of, and delivered to, the Registered Holder, or as such 
Registered Holder (upon payment by such Registered Holder of any applicable 
transfer taxes) may direct:

              (i)  a certificate or certificates for the number of shares of 
Warrant Stock to which such Registered Holder shall be entitled, and 

              (ii)  in case such exercise is in part only, a new warrant 
(dated the date hereof) of like tenor, calling in the aggregate on the face 
thereof for the number of shares of Warrant Stock equal to the number of such 
shares called for on the face of this Warrant minus the number of such shares 
purchased by the Registered Holder upon such exercise as provided in Section 
1(a) above.

    2.  PURCHASE PRICE AND NUMBER OF SHARES ISSUABLE UPON EXERCISE.  The 
number of shares of Warrant Stock issuable upon exercise of this Warrant and 
the Purchase Price therefor shall be determined as follows:

        (a)  If the average closing price of the Company's Common Stock as 
quoted on the Nasdaq National Market (the "NASDAQ") over the thirty (30) 
trading days ending on the close of business on the last trading day before 
the Date of Issuance of this Warrant (set forth above) (the "AVERAGE CLOSING 
PRICE") is less than $6.00 per share, 

              (i)  the Purchase Price shall be one hundred twenty percent 
(120%) of the Average Closing Price, and

              (ii)  the number of shares of Warrant Stock issuable hereunder 
shall be determined by dividing $2,000,000 by the Purchase Price determined 
pursuant to Section 2(a)(i) above; or 

        (b)  If the Average Closing Price is greater than or equal to $6.00 
per share, 

             (i)  the Purchase Price shall be the Average Closing Price, and 
the number of shares of Warrant Stock issuable hereunder shall be determined 
by dividing $2,000,000 by the Average Closing Price.


                                      3
<PAGE>

The number of shares of Warrant Stock and the Purchase Price shall be subject 
to adjustment as provided herein.

     3.  CERTAIN ADJUSTMENTS.

         (a)  MERGERS OR CONSOLIDATIONS.  If at any time there shall be a 
capital reorganization (other than a combination or subdivision of Warrant 
Stock otherwise provided for herein), or a merger or consolidation of the 
Company with another corporation other than an Acquisition (as defined in 
Section 6), then, as a part of such reorganization, merger or consolidation, 
lawful provision shall be made so that the Registered Holder shall thereafter 
be entitled to receive upon exercise of this Warrant, during the period 
specified in this Warrant and upon payment of the Purchase Price, the number 
of shares of stock or other securities or property of the Company or the 
successor corporation resulting from such reorganization, merger or 
consolidation, to which a holder of the Common Stock deliverable upon 
exercise of this Warrant would have been entitled under the provisions of the 
agreement in such reorganization, merger or consolidation if this Warrant had 
been exercised immediately before that reorganization, merger or 
consolidation.  In any such case, appropriate adjustment (as determined in 
good faith by the Company's Board of Directors) shall be made in the 
application of the provisions of this Warrant with respect to the rights and 
interests of the Registered Holder after the reorganization, merger or 
consolidation to the end that the provisions of this Warrant (including 
adjustment of the Purchase Price then in effect and the number of shares of 
Warrant Stock) shall be applicable after that event, as near as reasonably 
may be, in relation to any shares or other property deliverable after that 
event upon exercise of this Warrant.

         (b)  SPLITS AND SUBDIVISIONS; DIVIDENDS.  In the event the Company 
should at any time or from time to time fix a record date for the 
effectuation of a split or subdivision of the outstanding shares of Common 
Stock or the determination of the holders of Common Stock entitled to receive 
a dividend or other distribution payable in additional shares of Common Stock 
or other securities or rights convertible into, or entitling the holder 
thereof to receive directly or indirectly, additional shares of Common Stock 
(hereinafter referred to as the "COMMON STOCK EQUIVALENTS") without payment 
of any consideration by such holder for the additional shares of Common Stock 
or Common Stock Equivalents (including the additional shares of Common Stock 
issuable upon conversion or exercise thereof), then, as of such record date 
(or the date of such distribution, split or subdivision if no record date is 
fixed), the per share Purchase Price shall be appropriately decreased and the 
number of shares of Warrant Stock shall be appropriately increased in 
proportion to such increase (or potential increase) of outstanding shares.

         (c)  COMBINATION OF SHARES.  If the number of shares of Common Stock 
outstanding at any time after the date hereof is decreased by a combination 
of the outstanding shares of Common Stock, the per share purchase price shall 
be appropriately increased and the number of shares of Warrant Stock shall be 
appropriately decreased in proportion to such decrease in outstanding shares.


                                      4
<PAGE>

         (d)  ADJUSTMENTS FOR OTHER DISTRIBUTIONS.  In the event the Company 
shall declare a distribution payable in securities of other persons, 
evidences of indebtedness issued by the Company or other persons, assets 
(excluding cash dividends paid out of net profits) or options or rights not 
referred to in Section 3(b), then, in each such case for the purpose of this 
Section 3(d), upon exercise of this Warrant the holder hereof shall be 
entitled to a proportionate share of any such distribution as though such 
holder was the holder of the number of shares of Common Stock of the Company 
into which this Warrant may be exercised as of the record date fixed for the 
determination of the holders of Common Stock of the Company entitled to 
receive such distribution.

         (e)  When any adjustment is required to be made in the securities 
issuable upon exercise of this Warrant, the Company shall promptly mail to 
the Registered Holder a certificate setting forth a brief statement of the 
facts requiring such adjustment.  Such certificate shall also set forth the 
kind and amount of stock or other securities or property into which this 
Warrant shall be exercisable following the occurrence of any of the events 
specified in this Section 3.

     4.  REPRESENTATIONS; TRANSFER RESTRICTIONS.  

         (a)  The Registered Holder of this Warrant acknowledges that this 
Warrant and the Warrant Stock have not been registered under the Securities 
Act, and agrees not to sell, pledge, distribute, offer for sale, transfer or 
otherwise dispose of this Warrant or any Warrant Stock issued upon its 
exercise in the absence of (i) an effective registration statement under the 
Securities Act as to this Warrant or such Warrant Stock and registration or 
qualification of this Warrant or such Warrant Stock or (ii) an opinion of 
counsel, reasonably satisfactory to the Company, that such registration and 
qualification are not required.  Further, the Registered Holder agrees that 
this Warrant, and the rights hereunder may only be sold, pledged, 
distributed, offered for sale, transferred or otherwise disposed of to 
Schering A.G. or another wholly owned subsidiary of Schering A.G.  Other than 
as provided in this Section 4(a), this Warrant is not transferable without 
the prior written consent of the Company.  It is understood and agreed that 
the immediately preceding two sentences do not apply to, or limit the sale, 
pledge, distribution, offers for sale, transfer or other disposition of, 
Warrant Stock.

         (b)  The Registered Holder hereby further represents and warrants to 
the Company with respect to the issuance of the Warrant and the purchase of 
the Warrant Stock as follows:

              (i)  PURCHASE ENTIRELY FOR OWN ACCOUNT.  This Warrant is issued 
to the Registered Holder in reliance upon such Registered Holder's 
representation to the Company, which by such Registered Holder's execution of 
this Warrant such Registered Holder hereby confirms, that the Warrant and the 
Warrant Stock will be acquired for investment for such Registered Holder's 
own account, not as a nominee or agent, and not with a view to the resale or 
distribution of any part thereof, and that such Registered Holder has no 
present intention of selling, granting any participation in, or otherwise 
distributing the same.


                                      5
<PAGE>

              (ii)  KNOWLEDGE AND EXPERIENCE; ABILITY TO BEAR ECONOMIC RISKS. 
 The Registered Holder has such knowledge and experience in financial and 
business matters that it is capable of evaluating the merits and risks of the 
investment contemplated by this Warrant and such party is able to bear the 
economic risk of its investment in the Company (including a complete loss of 
its investment).

              (iii)  RESALE.  The Registered Holder understands that the 
Warrant being issued hereunder and the Warrant Stock to be purchased 
hereunder are characterized as "restricted securities" under the federal 
securities laws inasmuch as they are being acquired from the Company in a 
transaction not involving a public offering and that under such laws and 
applicable regulations, such securities may be resold without registration 
under the Securities Act only in certain circumstances.  In this regard, the 
Registered Holder represents that it is familiar with SEC Rule 144, as 
presently in effect, and understands the resale limitations imposed thereby 
and by the Securities Act.

              (iv)  LEGENDS.  The Registered Holder acknowledges that all 
stock certificates representing shares of stock issued to the Registered 
Holder upon exercise of this Warrant may, if such Warrant Stock is not 
registered under the Securities Act, have affixed thereto a legend 
substantially in the following form:

                    (x)  "THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE 
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE 
SECURITIES LAWS.  THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, 
HYPOTHECATED OR OTHERWISE TRANSFERRED IN THE ABSENCE OF A REGISTRATION 
STATEMENT IN EFFECT WITH RESPECT TO THE SECURITIES UNDER SUCH SECURITIES ACT 
OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION 
IS NOT REQUIRED OR UNLESS SOLD PURSUANT TO AN EXEMPTION TO SUCH SECURITIES 
ACT."

                    (y)  Any legend required by the laws of any state in 
which the securities will be issued.

         (c)  Subject to the provisions of Section 4(a) hereof, this Warrant 
and all rights hereunder are transferable in whole or in part upon surrender 
of the Warrant with a properly executed assignment (in the form of EXHIBIT B 
hereto) at the principal office of the Company.

         (d)  The Company may treat the Registered Holder of this Warrant as 
the absolute owner hereof for all purposes; PROVIDED, HOWEVER, that if and 
when this Warrant is properly assigned in blank, the Company may (but shall 
not be required to) treat the bearer hereof as the absolute owner hereof for 
all purposes, notwithstanding any notice to the contrary.

         (e)  The Company will maintain a register containing the names and 
addresses of the Registered Holders of this Warrant.  Any Registered Holder 
may change such Registered Holder's address as shown on the warrant register 
by written notice to the Company requesting such change.


                                      6
<PAGE>

         (f)  The Company hereby represents and warrants to the Registered 
Holder as follows:

              (i)   The Company is a corporation validly existing and in good 
standing under the laws of the State of California.

              (ii)  The Company has full corporate right, power and authority 
(including the due authorization by all necessary corporate action) to enter 
into this Warrant and the Registration Rights Agreement referred to in 
Section 18 hereof (the "REGISTRATION RIGHTS AGREEMENT") and to perform its 
obligations hereunder and thereunder without the need for the consent of any 
other person; and this Warrant and the Registration Rights Agreement have 
been duly authorized, executed and delivered and constitute legal, valid and 
binding obligations of the Company enforceable against it in accordance with 
the terms hereof and thereof.  The execution, delivery and performance of 
this Warrant and the Registration Rights Agreement by the Company does not 
contravene or violate any laws, rules or regulations applicable to it.

              (iii) The Company has taken such corporate action as is 
necessary or appropriate to enable it to perform its obligations hereunder, 
including, but not limited to, the issuance, sale and delivery of the Warrant.

              (iv)  The Warrant Stock, when issued and paid for in compliance 
with the provisions of this Warrant, will be validly issued, fully paid and 
non-assessable.

     5.  NO IMPAIRMENT.  The Company will not, by amendment of its charter or 
through reorganization, consolidation, merger, dissolution, sale of assets or 
any other voluntary action, avoid or seek to avoid the observance or 
performance of any of the terms of this Warrant, but will at all times in 
good faith assist in the carrying out of all such terms and in the taking of 
all such action as may be necessary or appropriate in order to protect the 
rights of the holder of this Warrant against impairment.

     6.  TERMINATION.  This Warrant (and the right to purchase securities 
upon exercise hereof) shall terminate upon the earliest to occur of the 
following (the "EXPIRATION DATE"): (i) April 25, 2001, or (ii) the closing of 
the Company's sale of all or substantially all of its assets or the 
acquisition of the Company by another entity by means of merger or other 
transaction as a result of which shareholders of the Company immediately 
prior to such acquisition possess a minority of the voting power of the 
acquiring entity immediately following such acquisition (an "ACQUISITION"); 
provided, however, that the Company shall give the Registered Holder at least 
ten (10) days prior written notice of the closing of any such Acquisition, 
including a statement that the Registered Holder's right to exercise this 
Warrant shall terminate upon the occurrence of such Acquisition.

     7.  NOTICES OF CERTAIN TRANSACTIONS.  In case:

         (a)  the Company shall take a record of the holders of its Common 
Stock (or other stock or securities at the time deliverable upon the exercise 
of this Warrant) for the purpose of entitling or enabling them to receive any 
dividend or other distribution, or any right to 


                                      7
<PAGE>

subscribe for, purchase or otherwise acquire any shares of stock of any class 
or any other securities or property, or to receive any other right; or

         (b)  of any capital reorganization of the Company, any 
reclassification of the capital stock of the Company, any consolidation or 
merger of the Company, any consolidation or merger of the Company with or 
into another corporation (other than a consolidation or merger in which the 
Company is the surviving entity), or any transfer of all or substantially all 
of the assets of the Company, or 

         (c)  of the voluntary or involuntary dissolution, liquidation or 
winding-up of the Company,

then, and in each such case, the Company will mail or cause to be mailed to 
the Registered Holder of this Warrant a notice specifying, as the case may 
be, (i) the date on which a record is to be taken for the purpose of such 
dividend, distribution or right, and stating the amount and character of such 
dividend, distribution or right, and (ii) the effective date on which such 
reorganization, reclassification, consolidation, merger, transfer, 
dissolution, liquidation or winding-up is expected to take place, and the 
record date for determining shareholders entitled to vote thereon.  Such 
notice shall be mailed at least ten (10) days prior to the record date or 
effective date for the event specified in such notice.

     8.  RESERVATION OF STOCK.  The Company will at all times reserve and 
keep available, solely for the issuance and delivery upon the exercise of 
this Warrant, such shares of Warrant Stock or other stock or securities, as 
from time to time shall be issuable upon the exercise of this Warrant.

     9.  EXCHANGE OF WARRANTS.  Upon the surrender by the Registered Holder 
of any Warrant, properly endorsed, to the Company at the principal office of 
the Company, the Company will, subject to the provisions of Section 4 hereof, 
issue and deliver to or upon the order of such Registered Holder, at the 
Company's expense, a new Warrant of like tenor, in the name of such 
Registered Holder or as such Registered Holder (upon payment by such 
Registered Holder of any applicable transfer taxes) may direct, calling in 
the aggregate on the face or faces thereof for the number of shares of Common 
Stock called for on the face or faces of the Warrant so surrendered.

     10.  REPLACEMENT OF WARRANTS.  Upon receipt of evidence reasonably 
satisfactory to the Company of the loss, theft, destruction or mutilation of 
this Warrant and (in the case of loss, theft or destruction) upon delivery of 
an indemnity agreement (with surety if reasonably required) in an amount 
reasonably satisfactory to the Company, or (in the case of mutilation) upon 
surrender and cancellation of this Warrant, the Company will issue, in lieu 
thereof, a new Warrant of like tenor.

     11.  MAILING OF NOTICES.  Any notice required or permitted by this 
Warrant shall be in writing and shall be deemed sufficient upon receipt, when 
delivered personally or by a nationally-recognized delivery service (such as 
Federal Express or UPS) or confirmed facsimile, or forty-eight (48) hours 
after being deposited in the U.S. mail as certified or registered mail with 


                                      8
<PAGE>

postage prepaid, if such notice is addressed to the party to be notified at 
such party's address or facsimile number as set forth below or as 
subsequently modified by written notice.

     12.  NO RIGHTS AS SHAREHOLDER.  Until the exercise of this Warrant, the 
Registered Holder of this Warrant shall not have or exercise any rights by 
virtue hereof as a shareholder of the Company (including without limitation 
the right to notification of shareholder meetings or the right to receive any 
notice or other communication concerning the business or affairs of the 
Company).

     13.  NO FRACTIONAL SHARES.  No fractional shares of Common Stock will be 
issued in connection with any exercise hereunder.  In lieu of any fractional 
shares which would otherwise be issuable, the Company shall pay cash equal to 
the product of such fraction multiplied by the fair market value of one share 
of Common Stock on the date of exercise, as determined in good faith by the 
Company's Board of Directors.

     14.  AMENDMENT OR WAIVER.  Any term of this Warrant may be amended or 
waived only by an instrument in writing signed by the party against which 
enforcement of the amendment or waiver is sought.

     15.  HEADINGS.  The headings in this Warrant are for purposes of 
reference only and shall not limit or otherwise affect the meaning of any 
provision of this Warrant.

     16.  SUCCESSORS AND ASSIGNS.  The terms and provisions of this Warrant 
shall inure to the benefit of, and be binding upon, the Company and the 
Registered Holder and their respective permitted successors and assigns (in 
the case of the Registered Holder, in accordance with Section 4).

     17.  GOVERNING LAW. This Warrant shall be governed, construed and 
interpreted in accordance with the laws of the State of California, without 
giving effect to principles of conflicts of law.  


                                      9
<PAGE>

     18.  REGISTRATION RIGHTS.  Concurrently with the execution of this 
Warrant, the Company and the Registered Holder shall execute the Registration 
Rights Agreement attached hereto as EXHIBIT C, granting the Registered Holder 
certain rights regarding registration of the Warrant Stock.


                                        METRA BIOSYSTEMS, INC.:


                                        By:____________________________
                                                  (Signature)

                                        Name:__________________________


                                        Title:_________________________

                                        Address:_______________________
                                        _______________________________
                                        _______________________________

                                        Facsimile:_____________________

REGISTERED HOLDER:


By:_____________________________
         (Signature)

Name:___________________________


Title:__________________________

Address:________________________
________________________________
________________________________

Facsimile:______________________


                                      10
<PAGE>

                                  EXHIBIT A

                                PURCHASE FORM

To: METRA BIOSYSTEMS, INC.                                         Dated:

    The undersigned, pursuant to the provisions set forth in the attached 
Warrant, hereby irrevocably elects to purchase ___________ shares of the 
Common Stock covered by such Warrant and herewith makes payment of 
$___________, representing the full purchase price for such shares at the 
price per share provided for in such Warrant.

    The undersigned hereby confirms and acknowledges the investment 
representations and warranties made in Section 4 of the Warrant and accepts 
such shares subject to the restrictions of the Warrant, copies of which are 
available from the Secretary of the Company.



                                      Signature:____________________________

                                      Address:______________________________

<PAGE>

                                  EXHIBIT B

                               ASSIGNMENT FORM

     FOR VALUE RECEIVED, _________________________________________ hereby 
sells, assigns and transfers all of the rights of the undersigned under the 
attached Warrant with respect to the number of shares of Common Stock covered 
thereby set forth below, unto:

     NAME OF ASSIGNEE             ADDRESS                   NO. OF SHARES
     ----------------             -------                   -------------


Dated:_________________                 Signature:____________________________

                                                  ____________________________

                                        Witness:______________________________

<PAGE>

                                   EXHIBIT C

                     FORM OF REGISTRATION RIGHTS AGREEMENT

                         REGISTRATION RIGHTS AGREEMENT


     THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is entered into as 
of April 25, 1997, by and among Metra Biosystems, Inc., a California 
corporation (the "Company"), and Berlex Laboratories, Inc. ("Berlex").

                                   RECITALS

     WHEREAS, the Company and Berlex have entered into a Co-Promotion 
Agreement of even date herewith (the "Co-Promotion Agreement"), which 
provides for the issuance to Berlex of certain warrants (the "Warrants") to 
purchase shares of Common Stock of the Company (the shares of Common Stock 
issuable upon exercise of the Warrants are referred to herein as the "Warrant 
Stock");

     WHEREAS, as a condition to the execution of the Co-Promotion Agreement 
the Company has agreed to grant certain registration rights to Berlex with 
respect to the Warrant Stock;

     WHEREAS, the registration rights granted hereunder are subject to 
existing registration rights granted by the Company to certain of its 
investors pursuant to that certain Registration Rights Agreement dated as of 
January 11, 1994 between the Company and the other parties thereto (the 
"Existing Agreement"), a copy of which has been made available to Berlex;

     NOW, THEREFORE, in consideration of the mutual promises and covenants 
hereinafter set forth, the parties agree as follows:

     Section 1.  REGISTRATION RIGHTS.

            1.1  DEFINITIONS.  As used in this Agreement:

                 (a)  The terms "register," "registered," and "registration" 
refer to a registration effected by preparing and filing a registration 
statement in compliance with the Securities Act of 1933, as amended (the 
"Securities Act"), and the subsequent declaration or ordering of the 
effectiveness of such registration statement.

                 (b) The term "Registrable Securities" means:

                     (i)  the Warrant Stock; and


<PAGE>

                     (ii)  any other shares of capital stock of the Company 
issued as (or issuable upon the conversion or exercise of any warrant, right 
or other security which is issued as) a dividend or other distribution with 
respect to, or in exchange for or in replacement of, the Warrant Stock, 
excluding in all cases, however, any Registrable Securities sold by a person 
in a transaction in which his or her rights under this Agreement are not 
assigned; PROVIDED, HOWEVER, that Common Stock or other securities shall only 
be treated as Registrable Securities if and so long as they have not been (A) 
sold to or through a broker or dealer or underwriter in a public distribution 
or a public securities transaction, or (B) sold in a transaction exempt from 
the registration and prospectus delivery requirements of the Securities Act 
under Section 4(1) thereof so that all transfer restrictions and restrictive 
legends with respect thereto, if any, are removed upon the consummation of 
such sale.

                 (c)  The number of shares of "Registrable Securities then 
outstanding" shall mean the number of shares of capital stock outstanding 
which are Registrable Securities, plus the number of shares of capital stock 
which are Registrable Securities issuable pursuant to then exercisable or 
convertible securities.

                 (d)  The term "Holder" means any holder of outstanding 
Registrable Securities who, subject to the limitations set forth in Section 
1.8 below, acquired such Registrable Securities in a transaction or series of 
transactions not involving any registered public offering.

                 (e)  The term "Form S-3" means such form under the 
Securities Act as in effect on the date hereof or any registration form under 
the Securities Act subsequently adopted by the Securities and Exchange 
Commission ("SEC") which permits inclusion or incorporation of substantial 
information by reference to other documents filed by the Company with the SEC.

                 (f)  The term "Other Holders" means any persons other than 
Holders and persons with registration rights pursuant to the Existing 
Agreement who, by virtue of agreements with the Company, are entitled to 
include their securities in certain registrations hereunder.

                 (g)  The term "Other Registrable Securities" means the 
Common Stock or other securities issued to, or issuable pursuant to 
conversion of convertible securities held by, Other Holders, which securities 
may be entitled to be included in certain registrations hereunder.

            1.2  DEMAND REGISTRATION.  In case the Company shall receive from 
any Holder or Holders owning in the aggregate at least fifty percent (50%) of 
the Registrable Securities then outstanding a written request or requests 
that the Company effect a registration on Form S-3 and any related 
qualification or compliance with respect to all or a part of the Registrable 
Securities owned by such Holder or Holders, the Company will:


                                      ii
<PAGE>

                 (a)  promptly give written notice of the proposed 
registration, and any related qualification or compliance, to all other 
Holders; and

                 (b)  promptly use its best efforts to effect such 
registration and all such qualifications and compliances as may be reasonably 
so requested and as would permit and facilitate the sale and distribution of 
all or such portion of such Holder's or Holders' Registrable Securities as 
are specified in such request, together with all or such portion of the 
Registrable Securities of any other Holder or Holders joining in such request 
as are specified in a written request given within 20 days after receipt of 
such written notice from the Company; provided, however, that all rights 
granted hereunder are subject to cutback pursuant to Section 3.6(b) of the 
Existing Agreement but the Holders' Registrable Securities shall not be 
subject to any reduction or exclusion pursuant to the rights of any Other 
Holders, and provided further that the Company shall not be obligated to 
effect any such registration, qualification or compliance, pursuant to this 
Section 1.2:

                     (i)   if Form S-3 is not available for such offering by 
the Holders (except as provided in paragraph (d) below);

                     (ii)  if the Company shall furnish to the Holders a 
certificate signed by the president of the Company stating that in the good 
faith judgment of the Board of Directors of the Company, it would be 
seriously detrimental to the Company and its Shareholders for such Form S-3 
Registration to be effected at such time, in which event the Company shall 
have the right to defer the filing of the Form S-3 registration statement for 
a period of not more than 120 days after receipt of the request of the Holder 
or Holders under this Section 1.2; provided, however, that the Company shall 
not utilize this right more than once in any twelve month period;

                     (iii) if the Company has, within the four (4) month 
period preceding the date of such request, already filed one registration 
statement on Form S-3  for any other holders of Company Securities pursuant 
to the Existing Agreement;

                     (iv)  if the Company has already effected two (2) 
registrations on Form S-3 for the Holders; provided, however, that the 
Holders shall not be limited to two (2) registrations to the extent that any 
of the Holders' Registrable Securities are excluded from such registrations; 
or

                     (v)  in any particular jurisdiction in which the Company 
would be required to qualify to do business or to execute a general consent 
to service of process in effecting such registration, qualification or 
compliance unless the Company is already subject to service in such 
jurisdiction and except as may be required under the Securities Act.

                 (c)  Subject to the foregoing, the Company shall file a 
registration statement on Form S-3 covering the Registrable Securities and 
other securities so requested to be registered promptly after receipt of the 
request or requests of the Holders.  With respect to 


                                     iii
<PAGE>

the first of such registrations, the Company and the Holders shall each pay 
one-half (1/2) of the expenses directly related to such registration; 
provided, however, that in no event shall the Company pay more than $15,000 
of such expenses.  All expenses incurred in connection with the second of 
such registrations, including (without limitation) all registration, filing, 
qualification, printer and accounting fees, as well as any underwriters' or 
brokers' fees, discounts or commissions relating to the Registrable 
Securities, or the fees or expenses of separate counsel to the selling 
Holders, shall be borne by such Holders.  Notwithstanding anything above to 
the contrary, (i) the Holders shall be liable for expenses (other than those 
to be paid by the Company in accordance herewith) only in the proportion that 
the Registrable Securities being registered bear to the total of all 
securities being registered and any such expenses for which the Holders are 
not liable shall not be included in the Company's and the Holders' 
calculation of total expenses for purposes of determining those expenses to 
be paid by the Company in accordance herewith  and (ii) it is understood and 
agreed that any fees or expenses of counsel to other parties and any brokers' 
fees, discounts or commissions relating to such other securities shall not be 
paid by the Holders and shall be paid by the Company or such other parties 
proposing to register securities.

                 (d)  Notwithstanding anything to the contrary herein, if 
Form S-3 is not available for such offering by the Holders, the Company shall 
use its best efforts to effect registrations on Form S-1, or any derivative 
or successor form thereto under the Securities Act,  covering the Registrable 
Securities.  In such event, all other provisions of this Section 1.2 shall 
apply with equal force to the requested registration; provided, however, that 
all registration, filing, qualification, printer and accounting fees, as well 
as any underwriters' or brokers' fees, discounts or commissions relating to 
the Registrable Securities, or the fees or expenses of separate counsel to 
the selling Holders, shall be borne by such Holders.  Notwithstanding 
anything above to the contrary, (i) the Holders shall be liable for expenses 
(other than those to be paid by the Company in accordance herewith) only in 
the proportion that the Registrable Securities being registered bear to the 
total of all securities being registered and any such expenses for which the 
Holders are not liable shall not be included in the Company's and the 
Holders' calculation of total expenses for purposes of determining those 
expenses to be paid by the Company in accordance herewith and (ii) it is 
understood and agreed that any fees or expenses of counsel to other parties 
and any brokers' fees, discounts or commissions relating to such other 
securities shall not be paid by the Holders and shall be paid by the Company 
or such other parties proposing to register securities.

                 (e)  If the Holders intend to distribute the Registrable 
Securities covered by their request by means of an underwriting, they shall 
so advise the Company as part of their request made pursuant to Section 
1.2(a) and the Company and the requesting Holders shall enter into an 
underwriting agreement in customary form (including, without limitation, such 
representations and warranties and indemnity and contribution provisions as 
the underwriter or underwriters customarily require) with the representative 
of the underwriter or underwriters selected for such underwriting by the 
Company, such underwriter or underwriters to be acceptable to the Holders.


                                     iv
<PAGE>

            1.3  COMPANY REGISTRATION.

                 (a)  NOTICE OF REGISTRATION.  If at any time or from time to 
time the Company shall determine to register shares of its Common Stock, 
either for its own account or the account of a security holder or holders, 
other than (i) a registration relating solely to employee benefit plans, or 
(ii) a registration relating solely to a Rule 145 transaction, the Company 
will:

                      (i)  promptly give to each Holder written notice 
thereof; and

                      (ii) include in such registration (and any related 
qualification under blue sky laws or other compliance), and in any 
underwriting involved therein, all the Registrable Securities specified in a 
written request, made within twenty (20) days after receipt of such written 
notice from the Company, by any Holder.

                 (b)  UNDERWRITING.  If the registration of which the Company 
gives notice is for a registered public offering involving an underwriting, 
the Company shall so advise the Holders as a part of the written notice given 
pursuant to Section 1.3(a)(i).  In such event the right of any Holder to 
registration pursuant to this Section 1.3 shall be conditioned upon such 
Holder's participation in such underwriting and the inclusion of Registrable 
Securities in the underwriting to the extent provided herein.  All Holders 
proposing to distribute their securities through such underwriting shall 
(together with the Company and the other holders distributing their 
securities through such underwriting) enter into an underwriting agreement in 
customary form with the managing underwriter selected for such underwriting 
by the Company.  Notwithstanding any other provision of this Section 1.3, if 
the managing underwriter determines that marketing factors require a 
limitation of the number of shares to be underwritten, the managing 
underwriter may limit to zero the Registrable Securities to be included in 
such registration; PROVIDED, that (i) any such limitation shall be applied to 
the Holders pro rata based upon the number of Registrable Securities held by 
them, (ii) that the shares of Registrable Securities proposed to be included 
in such registration shall be subject to exclusion pursuant to Section 3.6 of 
the Existing Agreement, and (iii) Other Registrable Securities shall be 
excluded entirely prior to any exclusion of Registrable Securities.  The 
Company shall so advise all holders of securities requesting registration 
through such underwriting, and subject to the preceding sentence, the number 
of shares of Registrable Securities that may be included in the registration 
and underwriting shall be allocated among all Holders in proportion, as 
nearly as practicable, to the respective amounts of Registrable Securities 
held by such Holders at the time of filing the registration statement.  To 
facilitate the allocation of shares in accordance with the above provisions, 
the Company may round the number of shares allocated to any Holder to the 
nearest one hundred (100) shares.  If any Holder disapproves of the terms of 
any such underwriting, he may elect to withdraw therefrom by written notice 
to the Company and the managing underwriter.  Any securities excluded or 
withdrawn from such underwriting shall be withdrawn from such registration.


                                      v
<PAGE>

                 (c)  RIGHT TO TERMINATE REGISTRATION.  The Company shall 
have the right to terminate or withdraw any registration initiated by it 
under this Section 1.3 prior to the effectiveness of such registration 
whether or not any Holder has elected to include securities in such 
registration.

            1.4  OBLIGATIONS OF THE COMPANY.  Whenever required under 
Sections 1.2 or 1.3 to effect the registration of any Registrable Securities, 
the Company shall, as reasonably possible:

                 (a)  Prepare and file with the SEC a registration statement 
with respect to such Registrable Securities and use its best efforts to cause 
such registration statement to become effective, and keep such registration 
statement effective for 180 days or such shorter period during which the 
Holders complete the distribution described in the registration statement 
relating thereto, whichever first occurs; and promptly notify the Holders (x) 
when such registration statement becomes effective, (y) when any amendment to 
such registration statement becomes effective and (z) of any request by the 
SEC for any amendment or supplement to such registration statement or any 
prospectus relating thereto or for additional information.

                 (b)  Prepare and file with the SEC such amendments and 
supplements to such registration statement and the prospectus used in 
connection with such registration statement as may be necessary to comply 
with the provisions of the Securities Act with respect to the disposition of 
all securities covered by such registration statement.

                 (c)  Notify each Holder of Registrable Securities covered by 
such registration statement, at any time when a prospectus relating thereto 
is required to be delivered under the Securities Act, of the happening of any 
event as a result of which the prospectus included in such registration 
statement, as then in effect, includes an untrue statement of a material fact 
or omits to state a material fact required to be stated therein or necessary 
to make the statements therein not misleading in the light of the 
circumstances then existing.

                 (d)  Furnish to the Holders, prior to filing a registration 
statement, copies of such registration statement as proposed to be filed, and 
thereafter such number of copies of such registration statement, each 
amendment and supplement thereto, the prospectus included in such 
registration statement (including each preliminary prospectus, reports on 
Forms 10-K, 10-Q and 8-K (or their equivalents) which the Company shall have 
filed with the SEC and financial statements, reports and proxy statements 
mailed to shareholders of the Company) as the Holders may reasonably request 
in order to facilitate the disposition of the Registrable Securities being 
offered by the Holders.

                 (e)  Make available, upon reasonable notice and during 
business hours, for inspection by the underwriter or underwriters, all 
financial and other records, pertinent corporate documents, agreements and 
properties of the Company as shall be necessary to enable such underwriters 
to exercise their due diligence responsibilities, and cause the Company's 


                                      vi
<PAGE>

officers, directors and employees to supply all information reasonably 
requested by any such underwriters in connection with the registration 
statement.

                 (f)  If the securities covered by the registration statement 
are to be sold through one or more underwriters, obtain a comfort letter from 
the Company's independent public accountants dated within five business days 
prior to the effective date of the registration statement (and as of such 
other dates as the underwriter or underwriters for the Registrable Securities 
may reasonably request) in customary form and covering such matters of the 
type customarily covered by such comfort letters as such underwriter or 
underwriters reasonably request.

                 (g)  If the Securities covered by the registration statement 
are to be sold through one or more underwriters, obtain an opinion of counsel 
dated the closing of the sale of the Registrable Securities (and as of such 
other dates as the underwriter or underwriters for the Registrable Securities 
may reasonably request) in customary form and covering such matters of the 
type customarily covered by such opinions as counsel designated by such 
underwriter or underwriters reasonably requests.

                 (h)  If the securities covered by the registration statement 
are to be sold through one or more underwriters, provide to the underwriter 
or underwriters representations and warranties of the Company, dated the 
closing of the sale of the Registrable Securities (and as of such other dates 
as the underwriter or underwriters for the Registrable Securities may 
reasonably request) in customary form and covering such matters of the type 
customarily covered by such representations and warranties as counsel 
designated by such underwriter or underwriters reasonably request.

                 (i)  Cause such Registrable Securities to be listed for 
trading on each securities exchange on which similar securities of the same 
class issued by the Company are then traded.

            1.5  FURNISH INFORMATION.  It shall be a condition precedent to 
the obligations of the Company to take any action pursuant to this Section 1 
with respect to the Registrable Securities of any selling Holder that such 
Holder shall furnish to the Company such information regarding itself, the 
Registrable Securities held by it, and the intended method of disposition of 
such securities as shall be required to effect the registration of such 
Holder's Registrable Securities.

            1.6  INDEMNIFICATION.  In the event any Registrable Securities 
are included in a registration statement under this Section 1:

                 (a)  To the extent permitted by law, the Company will 
indemnify and hold harmless each Holder and each person, if any, who controls 
such Holder within the meaning of the Securities Act or the Securities 
Exchange Act of 1934, as amended (the "1934 Act"), 


                                      vii
<PAGE>

against any losses, claims, damages, or liabilities (joint or several) to 
which any of the foregoing persons may become subject, under the Securities 
Act, the 1934 Act or other federal or state law, insofar as such losses, 
claims, damages, or liabilities (or actions in respect thereof) arise out of 
or are based upon any of the following statements, omissions or violations 
(collectively a "Violation"): (i) any untrue statement or alleged untrue 
statement of a material fact contained in such registration statement, 
including any final prospectus contained therein or any amendments or 
supplements thereto, (ii) the omission or alleged omission to state therein a 
material fact required to be stated therein, or necessary to make the 
statements therein not misleading, or (iii) any violation or alleged 
violation by the Company of the Securities Act, the 1934 Act, any state 
securities law or any rule or regulation promulgated under the Securities 
Act, the 1934 Act or any state securities law; and the Company will pay, as 
incurred, any legal or other expenses reasonably incurred by any person 
intended to be indemnified pursuant to this subsection 1.6(a), in connection 
with investigating or defending any such loss, claim, damage, liability, or 
action; provided, however, that the indemnity agreement contained in this 
subsection 1.6(a) shall not apply to amounts paid in settlement of any such 
loss, claim, damage, liability, or action if such settlement is effected 
without the consent of the Company, which consent shall not be unreasonably 
withheld, nor shall the Company be liable in any such case for any such loss, 
claim, damage, liability, or action to the extent that it arises out of or is 
based upon a Violation which occurs in reliance upon and in conformity with 
written information furnished expressly for use in connection with such 
registration by such Holder or controlling person.

                 (b)  To the extent permitted by law, each selling Holder 
will indemnify and hold harmless the Company, each of its directors, each of 
its officers who has signed the registration statement, each person, if any, 
who controls the Company within the meaning of the Securities Act or the 1934 
Act, any other Holder selling securities in such registration statement and 
any controlling person of any such other Holder, against any losses, claims, 
damages, or liabilities (joint or several) to which any of the foregoing 
persons may become subject, under the Securities Act, the 1934 Act or other 
federal or state law, insofar as such losses, claims, damages, or liabilities 
(or actions in respect thereof) arise out of or are based upon any Violation, 
in each case to the extent (and only to the extent) that such Violation 
occurs in reliance upon and in conformity with written information furnished 
by such Holder expressly for use in connection with such registration; and 
each such Holder will pay, as incurred, any legal or other expenses 
reasonably incurred by any person intended to be indemnified pursuant to this 
subsection 1.6(b), in connection with investigating or defending any such 
loss, claim, damage, liability, or action; provided, however, that the 
indemnity agreement contained in this subsection 1.6(b) shall not apply to 
amounts paid in settlement of any such loss, claim, damage, liability or 
action if such settlement is effected without the consent of the Holder, 
which consent shall not be unreasonably withheld; provided that in no event 
shall any indemnity under this subsection 1.6(b) exceed the gross proceeds 
from the offering received by such Holder.

                 (c)  Promptly after receipt by an indemnified party under 
this Section 1.6 of notice of the commencement of any action (including any 
governmental action), such indemnified party will, if a claim in respect 
thereof is to be made against any indemnifying 


                                      viii
<PAGE>

party under this Section 1.6, deliver to the indemnifying party a written 
notice of the commencement thereof and the indemnifying party shall have the 
right to participate in, and, to the extent the indemnifying party so 
desires, jointly with any other indemnifying party similarly noticed, to 
assume the defense thereof with counsel mutually satisfactory to the parties; 
provided, however, that an indemnified party shall have the right to retain 
its own counsel, with the fees and expenses to be paid by the indemnifying 
party, if representation of such indemnified party by the counsel retained by 
the indemnifying party would be inappropriate due to actual or potential 
differing interests between such indemnified party and any other party 
represented by such counsel in such proceeding.  The failure to deliver 
written notice to the indemnifying party within a reasonable time of the 
commencement of any such action, if prejudicial to its ability to defend such 
action, shall relieve such indemnifying party of any liability to the 
indemnified party under this Section 1.6, but the omission so to deliver 
written notice to the indemnifying party will not relieve it of any liability 
that it may have to any indemnified party otherwise than under this Section 
1.6.

                 (d)  If the indemnification provided in this Section 1.6 is 
held by a court of competent jurisdiction to be unavailable to an indemnified 
party with respect to any loss, liability, claim, damage or expense referred 
to therein, then the indemnifying party, in lieu of indemnifying such 
indemnified party hereunder, shall contribute to the amount paid or payable 
by such indemnified party as a result of such loss, liability, claim, damage 
or expense in such proportion as is appropriate to reflect the relative fault 
of the indemnifying party on the one hand and of the indemnified party on the 
other in connection with the statements or omissions that resulted in such 
loss, liability, claim, damage or expense as well as any other relevant 
equitable considerations.  The relative fault of the indemnifying party and 
of the indemnified party shall be determined by reference to, among other 
things, whether the untrue or alleged untrue statement of a material fact or 
the omission to state a material fact relates to information supplied by the 
indemnifying party or by the indemnified party and the parties' relative 
intent, knowledge, access to information, and opportunity to correct or 
prevent such statement or omission.

                 (e)  The obligations of the Company and Holders under this 
Section 1.6 shall survive the completion of any offering of Registrable 
Securities in a registration statement under this Section 1, and otherwise.

                 (f)  Notwithstanding the foregoing, to the extent that the 
provisions on indemnification and contribution contained in a negotiated 
underwriting agreement entered into in connection with an underwritten public 
offering are in conflict with the foregoing provisions, the provisions in the 
underwriting agreement shall be controlling.

            1.7  REPORTS UNDER SECURITIES EXCHANGE ACT OF 1934.  With a view 
to making available to the Holders the benefits of Rule 144 promulgated under 
the Securities Act and any other rule or regulation of the SEC that may at 
any time permit a Holder to sell securities of the Company to the public 
without registration, the Company agrees to use its best efforts to:

                                      ix
<PAGE>

                 (a)  make and keep public information available, as those 
terms are understood and defined in SEC Rule 144, at all times;

                 (b)  file with the SEC in a timely manner all reports and 
other documents required of the Company under the Securities Act and the 1934 
Act; and

                 (c)  furnish to any Holder, so long as the Holder owns any 
Registrable Securities, forthwith upon request (i) a written statement by the 
Company that it has complied with the reporting requirements of SEC Rule 144, 
the Securities Act and the 1934 Act, (ii) a copy of the most recent annual or 
quarterly report of the Company and such other reports and documents so filed 
by the Company, and (iii) such other information as may be reasonably 
requested in availing any Holder of any rule or regulation of the SEC which 
permits the selling of any such securities without registration.

            1.8  ASSIGNMENT OF REGISTRATION RIGHTS.  The rights to cause the 
Company to register Registrable Securities pursuant to this Section 1 may be 
assigned by a Holder to a transferee or assignee of at least the lesser of 
(a) all of such Holder's Registrable Securities, or (b) thirty percent (30%) 
of the total number of Warrant Stock (as adjusted for stock splits, 
combinations, dividends, or recapitalizations) provided the Company is, 
within a reasonable time after such transfer, furnished with written notice 
of the name and address of such transferee or assignee and the securities 
with respect to which such registration rights are being assigned; and 
provided, further, that such assign-ment shall be effective only if 
immediately following such transfer the further disposition of such 
securities by the transferee or assignee is restricted under the Securities 
Act.  The foregoing share limitation shall not apply, however, to transfers 
by Berlex to any wholly-owned subsidiary or affiliate (if a corporation), 
provided that all such transferees or assignees agree in writing to appoint a 
single representative as their attorney in fact for the purpose of receiving 
any notices and exercising their rights under this Section 1.

            1.9  TERMINATION OF REGISTRATION RIGHTS.  The rights granted 
under this Section 1 shall terminate upon the earliest of (a) one (1) year 
following the date upon which a Warrant shall have been exercised, in whole 
or in part, by Berlex or its transferee, (b) if no Warrant shall have been so 
exercised, the expiration date of the last of such Warrants to expire, or (c) 
with respect to any Holder, at such time as such Holder may sell all of such 
Holder's Registrable Securities in any one three month period pursuant to 
Rule 144 (or such successor rule as may be adopted).

     Section 2.  MISCELLANEOUS.

            2.1  ASSIGNMENT.  Subject to the provisions of Section 1.8 
hereof, the terms and conditions of this Agreement shall inure to the benefit 
of and be binding upon the respective successors and assigns of the parties 
hereto.


                                      x
<PAGE>

            2.2  THIRD PARTIES.  Nothing in this Agreement, express or 
implied, is intended to confer upon any party, other than the parties hereto, 
and their respective successors and assigns, any rights, remedies, 
obligations or liabilities under or by reason of this Agreement, except as 
expressly provided herein.

            2.3  GOVERNING LAW.  This Agreement shall be governed by and 
construed under the laws of the State of California in the United States of 
America.

            2.4  COUNTERPARTS.  This Agreement may be executed in two or more 
counterparts, each of which shall be deemed an original, but all of which 
together shall constitute one and the same instrument.

            2.5  NOTICES.

                 (a)  All notices, requests, demands and other communications 
under this Agreement or in connection herewith shall be given to or made upon 
the respective parties as follows:

     To the Company:                 Metra Biosystems, Inc.
                                     265 N. Whisman Road
                                     Mountain View, CA 94043
                                     fax: (415) 903-0500
                                     Attention:  Chief Financial Officer

     To Berlex:                      Berlex Laboratories, Inc.
                                     300 Fairfield Road
                                     Wayne, New Jersey 07470
                                     fax: (201) 303-4405
                                     Attention:  General Counsel

                 (b)  All notices, requests, demands and other communications 
given or made in accordance with the provisions of this Agreement shall be in 
writing, and shall be sent by airmail, return receipt requested, reputable 
overnight courier or by telex or telecopy (facsimile) with confirmation of 
receipt, and shall be deemed to be given or made when receipt is so confirmed.

                 (c)  Any party may, by written notice to the other, alter 
its address or respondent, and such notice shall be considered to have been 
given ten (10) days after the airmailing, telexing, telecopying or delivery 
thereof.

            2.6  SEVERABILITY.  If one or more provisions of this Agreement 
are held to be unenforceable under applicable law, portions of such 
provisions, or such provisions in their 


                                      xi
<PAGE>

entirety, to the extent necessary, shall be severed from this Agreement, and 
the balance of this Agreement shall be enforceable in accordance with its 
terms.

            2.7  AMENDMENT AND WAIVER.  Any provision of this Agreement may 
be amended with the written consent of the Company and the Holders of at 
least a majority of the outstanding Registrable Securities.  Any amendment or 
waiver effected in accordance with this paragraph shall be binding upon each 
Holder of Registrable Securities, and the Company.  In addition, the Company 
may waive performance of any obligation owing to it, as to some or all of the 
Holders of Registrable Securities, or agree to accept alternatives to such 
performance, without obtaining the consent of any Holder of Registrable 
Securities.

            2.8  RIGHTS OF HOLDERS.  Each holder of Registrable Securities 
shall have the absolute right to exercise or refrain from exercising any 
right or rights that such holder may have by reason of this Agreement, 
including, without limitation, the right to consent to the waiver or 
modification of any obligation under this Agreement, and such holder shall 
not incur any liability to any other holder of any securities of the Company 
as a result of exercising or refraining from exercising any such right or 
rights.

            2.9  DELAYS OR OMISSIONS.  No delay or omission to exercise any 
right, power or remedy accruing to any party to this Agreement, upon any 
breach or default of the other party, shall impair any such right, power or 
remedy of such non-breaching party nor shall it be construed to be a waiver 
of any such breach or default, or an acquiescence therein, or of or in any 
similar breach or default thereafter occurring; nor shall any waiver of any 
single breach or default be deemed a waiver of any other breach or default 
theretofore or thereafter occurring.  Any waiver, permit, consent or approval 
of any kind or character on the part of any party of any breach or default 
under this Agreement, or any waiver on the part of any party of any 
provisions or conditions of this Agreement, must be made in writing and shall 
be effective only to the extent specifically set forth in such writing.  All 
remedies, either under this Agreement, or by law or otherwise afforded to any 
holder, shall be cumulative and not alternative.

            2.10  CONSTRUCTION. This Agreement shall not be construed to 
grant Berlex or any other Holder hereunder rights which are greater than PARI 
PASSU with those rights of the holders of registration rights under the 
Existing Agreement.

            2.11  S-3 ELIGIBILITY.  The Company covenants to use its best 
efforts to remain eligible to use the Form S-3 registration statement at all 
times.

                         [Signature page follows]


                                      xii
<PAGE>


     IN WITNESS WHEREOF, the parties have executed this Registration Rights 
Agreement as of the date first above written.

COMPANY:                                   BERLEX:

METRA BIOSYSTEMS, INC.                     BERLEX LABORATORIES, INC.

By:____________________________            By:____________________________ 
                                                                           
Title:_________________________            Title:_________________________ 



                                     xiii
<PAGE>

                                   EXHIBIT C

            FORM OF ADDITIONAL COMMON STOCK WARRANT, IF ISSUED

THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS 
AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND HAS BEEN 
ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE 
SALE OR DISTRIBUTION THEREOF.  NO SUCH SALE OR DISPOSITION MAY BE EFFECTED 
WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF 
COUNSEL, REASONABLY SATISFACTORY TO THE COMPANY, THAT SUCH REGISTRATION IS 
NOT REQUIRED UNDER THE SECURITIES ACT.

Warrant No. WC-______                         Number of Shares:  _________
Date of Issuance: ___________                 (subject to adjustment)


                             METRA BIOSYSTEMS, INC.

                          COMMON STOCK PURCHASE WARRANT

     Metra Biosystems, Inc. (the "COMPANY"), for value received, hereby 
certifies that Berlex Laboratories, Inc., or its registered assigns (in 
accordance with Section 4 below) (the "REGISTERED HOLDER"), is entitled, 
subject to the terms set forth below, to purchase from the Company, at any 
time commencing on the Date of Issuance (set forth above) and on or before 
the Expiration Date (as defined in Section 6 below), up to that number of 
shares of Common Stock of the Company as shall be determined pursuant to 
Section 2 below, at an exercise price per share as shall also be determined 
pursuant to Section 2.  The shares purchasable upon exercise of this Warrant 
are hereinafter referred to as the "WARRANT STOCK." The exercise price per 
share of Warrant Stock is hereinafter referred to as the "PURCHASE PRICE."

     1.  EXERCISE.

         (a)  MANNER OF EXERCISE.  This Warrant may be exercised by the 
Registered Holder, in whole or in part, by surrendering this Warrant, with 
the purchase form appended hereto as EXHIBIT A duly executed by such 
Registered Holder or by such Registered Holder's duly authorized 
attorney-in-fact, at the principal office of the Company, or at such other 
office or agency as the Company may designate, accompanied by payment in full 
by cash, check or wire transfer of the Purchase Price payable in respect of 
the number of shares of Warrant Stock purchased upon such exercise.

         (b)  EFFECTIVE TIME OF EXERCISE.  Each exercise of this Warrant 
shall be deemed to have been effected immediately prior to the close of 
business on the day on which this 


<PAGE>

Warrant shall have been surrendered to the Company, with payment of the 
applicable Purchase Price, as provided in Section 1(a) above; provided, 
however, that if this Warrant is exercised in connection with or in 
contemplation of an Acquisition (as defined in Section 6 below), such 
exercise may be conditioned upon the closing of such Acquisition, in which 
case this Warrant shall  be deemed to have been exercised immediately prior 
to such closing and, if such closing does not occur, this Warrant shall be 
deemed to not have been exercised.  At such time, the person or persons in 
whose name or names any certificates for Warrant Stock shall be issuable upon 
such exercise as provided in Section 1(c) below shall be deemed to have 
become the holder or holders of record of the Warrant Stock represented by 
such certificates.

         (c)  DELIVERY TO REGISTERED HOLDER.  As soon as practicable after 
the exercise of this Warrant in whole or in part, and in any event within 
twenty (20) days thereafter, the Company at its expense will cause to be 
issued in the name of, and delivered to, the Registered Holder, or as such 
Registered Holder (upon payment by such Registered Holder of any applicable 
transfer taxes) may direct:

              (i)   a certificate or certificates for the number of shares of 
Warrant Stock to which such Registered Holder shall be entitled, and 

              (ii)  in case such exercise is in part only, a new warrant 
(dated the date hereof) of like tenor, calling in the aggregate on the face 
thereof for the number of shares of Warrant Stock equal to the number of such 
shares called for on the face of this Warrant minus the number of such shares 
purchased by the Registered Holder upon such exercise as provided in Section 
1(a) above.

     2.  PURCHASE PRICE AND NUMBER OF SHARES ISSUABLE UPON EXERCISE.  The 
number of shares of Warrant Stock issuable upon exercise of this Warrant and 
the Purchase Price therefor shall be determined as follows:

         (a)  If the average closing price of the Company's Common Stock as 
quoted on the Nasdaq National Market (the "NASDAQ") over the thirty (30) 
trading days ending on the close of business on the last trading day thirty 
(30) days before the Date of Issuance of this Warrant (set forth above) (the 
"AVERAGE CLOSING PRICE") is less than $11.00 per share, 

              (i)   the Purchase Price shall be one hundred ten percent (110%) 
of the Average Closing Price, provided such purchase price shall not be in 
excess of $11.00 per share, and

              (ii)  the number of shares of Warrant Stock issuable hereunder 
shall be determined by dividing $3,000,000 by the Purchase Price determined 
pursuant to Section 2(a)(i) above; or 

         (b)  If the Average Closing Price is greater than or equal to $11.00 
per share, 

              (i)  the Purchase Price shall be the Average Closing Price, and 


                                     -15-
<PAGE>

              (ii)  the number of shares of Warrant Stock issuable hereunder 
shall be determined by dividing $3,000,000 by the Average Closing Price.

The number of shares of Warrant Stock and the Purchase Price shall be subject 
to adjustment as provided herein.

     3.  CERTAIN ADJUSTMENTS.

         (a)  MERGERS OR CONSOLIDATIONS.  If at any time there shall be a 
capital reorganization (other than a combination or subdivision of Warrant 
Stock otherwise provided for herein), or a merger or consolidation of the 
Company with another corporation other than an Acquisition (as defined in 
Section 6), then, as a part of such reorganization, merger or consolidation, 
lawful provision shall be made so that the Registered Holder shall thereafter 
be entitled to receive upon exercise of this Warrant, during the period 
specified in this Warrant and upon payment of the Purchase Price, the number 
of shares of stock or other securities or property of the Company or the 
successor corporation resulting from such reorganization, merger or 
consolidation, to which a holder of the Common Stock deliverable upon 
exercise of this Warrant would have been entitled under the provisions of the 
agreement in such reorganization, merger or consolidation if this Warrant had 
been exercised immediately before that reorganization, merger or 
consolidation.  In any such case, appropriate adjustment (as determined in 
good faith by the Company's Board of Directors) shall be made in the 
application of the provisions of this Warrant with respect to the rights and 
interests of the Registered Holder after the reorganization, merger or 
consolidation to the end that the provisions of this Warrant (including 
adjustment of the Purchase Price then in effect and the number of shares of 
Warrant Stock) shall be applicable after that event, as near as reasonably 
may be, in relation to any shares or other property deliverable after that 
event upon exercise of this Warrant.

         (b)  SPLITS AND SUBDIVISIONS; DIVIDENDS.  In the event the Company 
should at any time or from time to time fix a record date for the 
effectuation of a split or subdivision of the outstanding shares of Common 
Stock or the determination of the holders of Common Stock entitled to receive 
a dividend or other distribution payable in additional shares of Common Stock 
or other securities or rights convertible into, or entitling the holder 
thereof to receive directly or indirectly, additional shares of Common Stock 
(hereinafter referred to as the "COMMON STOCK EQUIVALENTS") without payment 
of any consideration by such holder for the additional shares of Common Stock 
or Common Stock Equivalents (including the additional shares of Common Stock 
issuable upon conversion or exercise thereof), then, as of such record date 
(or the date of such distribution, split or subdivision if no record date is 
fixed), the per share Purchase Price shall be appropriately decreased and the 
number of shares of Warrant Stock shall be appropriately increased in 
proportion to such increase (or potential increase) of outstanding shares.

         (c)  COMBINATION OF SHARES.  If the number of shares of Common Stock 
outstanding at any time after the date hereof is decreased by a combination 
of the outstanding shares of Common Stock, the per share purchase price shall 
be appropriately increased and the 


                                     -16-
<PAGE>

number of shares of Warrant Stock shall be appropriately decreased in 
proportion to such decrease in outstanding shares.

         (d)  ADJUSTMENTS FOR OTHER DISTRIBUTIONS.  In the event the Company 
shall declare a distribution payable in securities of other persons, 
evidences of indebtedness issued by the Company or other persons, assets 
(excluding cash dividends paid out of net profits) or options or rights not 
referred to in Section 3(b), then, in each such case for the purpose of this 
Section 3(d), upon exercise of this Warrant the holder hereof shall be 
entitled to a proportionate share of any such distribution as though such 
holder was the holder of the number of shares of Common Stock of the Company 
into which this Warrant may be exercised as of the record date fixed for the 
determination of the holders of Common Stock of the Company entitled to 
receive such distribution.

         (e)  When any adjustment is required to be made in the securities 
issuable upon exercise of this Warrant, the Company shall promptly mail to 
the Registered Holder a certificate setting forth a brief statement of the 
facts requiring such adjustment.  Such certificate shall also set forth the 
kind and amount of stock or other securities or property into which this 
Warrant shall be exercisable following the occurrence of any of the events 
specified in this Section 3.

     4.  REPRESENTATIONS; TRANSFER RESTRICTIONS.  

         (a)  The Registered Holder of this Warrant acknowledges that this 
Warrant and the Warrant Stock have not been registered under the Securities 
Act, and agrees not to sell, pledge, distribute, offer for sale, transfer or 
otherwise dispose of this Warrant or any Warrant Stock issued upon its 
exercise in the absence of (i) an effective registration statement under the 
Securities Act as to this Warrant or such Warrant Stock and registration or 
qualification of this Warrant or such Warrant Stock or (ii) an opinion of 
counsel, reasonably satisfactory to the Company, that such registration and 
qualification are not required.  Further, the Registered Holder agrees that 
this Warrant, and the rights hereunder may only be sold, pledged, 
distributed, offered for sale, transferred or otherwise disposed of to 
Schering A.G. or another wholly owned subsidiary of Schering A.G.  Other than 
as provided in this Section 4(a), this Warrant is not transferable without 
the prior written consent of the Company.  It is understood and agreed that 
the immediately preceding two sentences do not apply to, or limit the sale, 
pledge, distribution, offers for sale, transfer or other disposition of, 
Warrant Stock.

         (b)  The Registered Holder hereby further represents and warrants to 
the Company with respect to the issuance of the Warrant and the purchase of 
the Warrant Stock as follows:

              (i)  PURCHASE ENTIRELY FOR OWN ACCOUNT.  This Warrant is issued 
to the Registered Holder in reliance upon such Registered Holder's 
representation to the Company, which by such Registered Holder's execution of 
this Warrant such Registered Holder hereby confirms, that the Warrant and the 
Warrant Stock will be acquired for investment for such Registered Holder's 
own account, not as a nominee or agent, and not with a view to the resale or 


                                     -17-
<PAGE>

distribution of any part thereof, and that such Registered Holder has no 
present intention of selling, granting any participation in, or otherwise 
distributing the same.

              (ii)  KNOWLEDGE AND EXPERIENCE; ABILITY TO BEAR ECONOMIC RISKS. 
 The Registered Holder has such knowledge and experience in financial and 
business matters that it is capable of evaluating the merits and risks of the 
investment contemplated by this Warrant and such party is able to bear the 
economic risk of its investment in the Company (including a complete loss of 
its investment).

              (iii)  RESALE.  The Registered Holder understands that the 
Warrant being issued hereunder and the Warrant Stock to be purchased 
hereunder are characterized as "restricted securities" under the federal 
securities laws inasmuch as they are being acquired from the Company in a 
transaction not involving a public offering and that under such laws and 
applicable regulations, such securities may be resold without registration 
under the Securities Act only in certain circumstances.  In this regard, the 
Registered Holder represents that it is familiar with SEC Rule 144, as 
presently in effect, and understands the resale limitations imposed thereby 
and by the Securities Act.

              (iv)  LEGENDS.  The Registered Holder acknowledges that all 
stock certificates representing shares of stock issued to the Registered 
Holder upon exercise of this Warrant may, if such Warrant Stock is not 
registered under the Securities Act, have affixed thereto a legend 
substantially in the following form:

                    (x)  "THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE 
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE 
SECURITIES LAWS.  THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, 
HYPOTHECATED OR OTHERWISE TRANSFERRED IN THE ABSENCE OF A REGISTRATION 
STATEMENT IN EFFECT WITH RESPECT TO THE SECURITIES UNDER SUCH SECURITIES ACT 
OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION 
IS NOT REQUIRED OR UNLESS SOLD PURSUANT TO AN EXEMPTION TO SUCH SECURITIES 
ACT."

                    (y)  Any legend required by the laws of any state in 
which the securities will be issued.

         (c)  Subject to the provisions of Section 4(a) hereof, this Warrant 
and all rights hereunder are transferable in whole or in part upon surrender 
of the Warrant with a properly executed assignment (in the form of EXHIBIT B 
hereto) at the principal office of the Company.

         (d)  The Company may treat the Registered Holder of this Warrant as 
the absolute owner hereof for all purposes; PROVIDED, HOWEVER, that if and 
when this Warrant is properly assigned in blank, the Company may (but shall 
not be required to) treat the bearer hereof as the absolute owner hereof for 
all purposes, notwithstanding any notice to the contrary.

         (e)  The Company will maintain a register containing the names and 
addresses of the Registered Holders of this Warrant.  Any Registered Holder 
may change such Registered 


                                     -18-
<PAGE>

Holder's address as shown on the warrant register by written notice to the 
Company requesting such change.

         (f)  The Company hereby represents and warrants to the Registered 
Holder as follows:

              (i)    The Company is a corporation validly existing and in good 
standing under the laws of the State of California.

              (ii)   The Company has full corporate right, power and authority 
(including the due authorization by all necessary corporate action) to enter 
into this Warrant and the Registration Rights Agreement referred to in 
Section 18 hereof (the "REGISTRATION RIGHTS AGREEMENT") and to perform its 
obligations hereunder and thereunder without the need for the consent of any 
other person; and this Warrant and the Registration Rights Agreement have 
been duly authorized, executed and delivered and constitute legal, valid and 
binding obligations of the Company enforceable against it in accordance with 
the terms hereof and thereof.  The execution, delivery and performance of 
this Warrant and the Registration Rights Agreement by the Company does not 
contravene or violate any laws, rules or regulations applicable to it.

              (iii)  The Company has taken such corporate action as is 
necessary or appropriate to enable it to perform its obligations hereunder, 
including, but not limited to, the issuance, sale and delivery of the Warrant.

              (iv)   The Warrant Stock, when issued and paid for in 
compliance with the provisions of this Warrant, will be validly issued, fully 
paid and non-assessable.

     5.  NO IMPAIRMENT.  The Company will not, by amendment of its charter or 
through reorganization, consolidation, merger, dissolution, sale of assets or 
any other voluntary action, avoid or seek to avoid the observance or 
performance of any of the terms of this Warrant, but will at all times in 
good faith assist in the carrying out of all such terms and in the taking of 
all such action as may be necessary or appropriate in order to protect the 
rights of the holder of this Warrant against impairment.

     6.  TERMINATION.  This Warrant (and the right to purchase securities 
upon exercise hereof) shall terminate upon the earliest to occur of the 
following (the "EXPIRATION DATE"): (i) the third anniversary of the Date of 
Issuance (set forth above), or (ii) the closing of the Company's sale of all 
or substantially all of its assets or the acquisition of the Company by 
another entity by means of merger or other transaction as a result of which 
shareholders of the Company immediately prior to such acquisition possess a 
minority of the voting power of the acquiring entity immediately following 
such acquisition (an "ACQUISITION"); provided, however, that the Company 
shall give the Registered Holder at least ten (10) days prior written notice 
of the closing of any such Acquisition, including a statement that the 
Registered Holder's right to exercise this Warrant shall terminate upon the 
occurrence of such Acquisition.

      7.  NOTICES OF CERTAIN TRANSACTIONS.  In case:


                                     -19-
<PAGE>

           (a)  the Company shall take a record of the holders of its Common 
Stock (or other stock or securities at the time deliverable upon the exercise 
of this Warrant) for the purpose of entitling or enabling them to receive any 
dividend or other distribution, or any right to subscribe for, purchase or 
otherwise acquire any shares of stock of any class or any other securities or 
property, or to receive any other right; or

           (b)  of any capital reorganization of the Company, any 
reclassification of the capital stock of the Company, any consolidation or 
merger of the Company, any consolidation or merger of the Company with or 
into another corporation (other than a consolidation or merger in which the 
Company is the surviving entity), or any transfer of all or substantially all 
of the assets of the Company, or 

           (c)  of the voluntary or involuntary dissolution, liquidation or 
winding-up of the Company,

then, and in each such case, the Company will mail or cause to be mailed to 
the Registered Holder of this Warrant a notice specifying, as the case may 
be, (i) the date on which a record is to be taken for the purpose of such 
dividend, distribution or right, and stating the amount and character of such 
dividend, distribution or right, and (ii) the effective date on which such 
reorganization, reclassification, consolidation, merger, transfer, 
dissolution, liquidation or winding-up is expected to take place, and the 
record date for determining shareholders entitled to vote thereon.  Such 
notice shall be mailed at least ten (10) days prior to the record date or 
effective date for the event specified in such notice.

     8.  RESERVATION OF STOCK.  The Company will at all times reserve and 
keep available, solely for the issuance and delivery upon the exercise of 
this Warrant, such shares of Warrant Stock or other stock or securities, as 
from time to time shall be issuable upon the exercise of this Warrant.

     9.  EXCHANGE OF WARRANTS.  Upon the surrender by the Registered Holder 
of any Warrant, properly endorsed, to the Company at the principal office of 
the Company, the Company will, subject to the provisions of Section 4 hereof, 
issue and deliver to or upon the order of such Registered Holder, at the 
Company's expense, a new Warrant of like tenor, in the name of such 
Registered Holder or as such Registered Holder (upon payment by such 
Registered Holder of any applicable transfer taxes) may direct, calling in 
the aggregate on the face or faces thereof for the number of shares of Common 
Stock called for on the face or faces of the Warrant so surrendered.

     10.  REPLACEMENT OF WARRANTS.  Upon receipt of evidence reasonably 
satisfactory to the Company of the loss, theft, destruction or mutilation of 
this Warrant and (in the case of loss, theft or destruction) upon delivery of 
an indemnity agreement (with surety if reasonably required) in an amount 
reasonably satisfactory to the Company, or (in the case of mutilation) upon 
surrender and cancellation of this Warrant, the Company will issue, in lieu 
thereof, a new Warrant of like tenor.


                                     -20-
<PAGE>

     11.  MAILING OF NOTICES.  Any notice required or permitted by this 
Warrant shall be in writing and shall be deemed sufficient upon receipt, when 
delivered personally or by a nationally-recognized delivery service (such as 
Federal Express or UPS) or confirmed facsimile, or forty-eight (48) hours 
after being deposited in the U.S. mail as certified or registered mail with 
postage prepaid, if such notice is addressed to the party to be notified at 
such party's address or facsimile number as set forth below or as 
subsequently modified by written notice.

     12.  NO RIGHTS AS SHAREHOLDER.  Until the exercise of this Warrant, the 
Registered Holder of this Warrant shall not have or exercise any rights by 
virtue hereof as a shareholder of the Company (including without limitation 
the right to notification of shareholder meetings or the right to receive any 
notice or other communication concerning the business or affairs of the 
Company).

     13.  NO FRACTIONAL SHARES.  No fractional shares of Common Stock will be 
issued in connection with any exercise hereunder.  In lieu of any fractional 
shares which would otherwise be issuable, the Company shall pay cash equal to 
the product of such fraction multiplied by the fair market value of one share 
of Common Stock on the date of exercise, as determined in good faith by the 
Company's Board of Directors.

     14.  AMENDMENT OR WAIVER.  Any term of this Warrant may be amended or 
waived only by an instrument in writing signed by the party against which 
enforcement of the amendment or waiver is sought.

     15.  HEADINGS.  The headings in this Warrant are for purposes of 
reference only and shall not limit or otherwise affect the meaning of any 
provision of this Warrant.

     16.  SUCCESSORS AND ASSIGNS.  The terms and provisions of this Warrant 
shall inure to the benefit of, and be binding upon, the Company and the 
Registered Holder and their respective permitted successors and assigns (in 
the case of the Registered Holder, in accordance with Section 4).

     17.  GOVERNING LAW. This Warrant shall be governed, construed and 
interpreted in accordance with the laws of the State of California, without 
giving effect to principles of conflicts of law.  


                                     -21-
<PAGE>

     18.  REGISTRATION RIGHTS.  The Warrant Stock shall be subject to the 
Registration Rights Agreement executed April ___, 1997 between the Company 
and the Registered Holder, the form of which is attached hereto as EXHIBIT C.

                                       METRA BIOSYSTEMS, INC.:


                                       By:______________________________
                                                  (Signature)

                                       Name:____________________________


                                       Title:___________________________

                                       Address:_________________________
                                       _________________________________
                                       _________________________________

                                       Facsimile:_______________________

REGISTERED HOLDER:


By:_____________________________
          (Signature)

Name:___________________________


Title:__________________________

Address:________________________
________________________________
________________________________

Facsimile:______________________


                                     -22-
<PAGE>

                                   EXHIBIT A

                                 PURCHASE FORM

To: METRA BIOSYSTEMS, INC.                                        Dated:

     The undersigned, pursuant to the provisions set forth in the attached 
Warrant, hereby irrevocably elects to purchase ___________ shares of the 
Common Stock covered by such Warrant and herewith makes payment of 
$___________, representing the full purchase price for such shares at the 
price per share provided for in such Warrant.

     The undersigned hereby confirms and acknowledges the investment 
representations and warranties made in Section 4 of the Warrant and accepts 
such shares subject to the restrictions of the Warrant, copies of which are 
available from the Secretary of the Company.



                                       Signature:___________________________

                                       Address:_____________________________

<PAGE>

                                      EXHIBIT B

                                    ASSIGNMENT FORM

     FOR VALUE RECEIVED, _________________________________________ hereby 
sells, assigns and transfers all of the rights of the undersigned under the 
attached Warrant with respect to the number of shares of Common Stock covered 
thereby set forth below, unto:

      NAME OF ASSIGNEE               ADDRESS              NO. OF SHARES
      ----------------               -------              -------------



Dated:_________________                   Signature:_________________________
   
                                                    _________________________

                                          Witness:___________________________

<PAGE>

                                     EXHIBIT C

                      FORM OF REGISTRATION RIGHTS AGREEMENT

See Exhibit C to Exhibit B to the Co-Promotion Agreement.


<PAGE>

                       CHANGE OF CONTROL AGREEMENT


     This Change of Control Agreement (the "Agreement") is made and entered 
into effective as of < < Date > >, by and between  < < Employee > > (the 
"Employee") and Metra Biosystems, Inc., a California corporation (the 
"Company").

                             RECITALS

    A.  It is expected that another company or other entity may from time to 
time consider the possibility of acquiring the Company or that a change in 
control may otherwise occur, with or without the approval of the Company's 
Board of Directors (the "Board").  The Board recognizes that such 
consideration can be a distraction to the Employee, an executive corporate 
officer of the Company, and can cause the Employee to consider alternative 
employment opportunities.  The Board has determined that it is in the best 
interests of the Company and its shareholders to assure that the Company will 
have the continued dedication and objectivity of the Employee, 
notwithstanding the possibility, threat or occurrence of a Change of Control 
(as defined below) of the Company.

     B.  The Board believes that it is in the best interests of the Company 
and its shareholders to provide the Employee with an incentive to continue 
his or her employment with the Company.

     C.  The Board believes that it is imperative to provide the Employee 
with certain benefits upon a Change of Control and, under certain 
circumstances, upon termination of the Employee's employment in connection 
with a Change of Control, which benefits are intended to provide the Employee 
with financial security and provide sufficient income and encouragement to 
the Employee to remain with the Company notwithstanding the possibility of a 
Change of Control.

     D.  To accomplish the foregoing objectives, the Board of Directors has 
directed the Company, upon execution of this Agreement by the Employee, to 
agree to the terms provided in this Agreement.

     E.  Certain capitalized terms used in the Agreement are defined in 
Section 4 below.

     In consideration of the mutual covenants herein contained, and in 
consideration of the continuing employment of Employee by the Company, the 
parties agree as follows:

         1.  AT-WILL EMPLOYMENT.  The Company and the Employee acknowledge 
that the Employee's employment is and shall continue to be at-will, as 
defined under applicable law.  If the Employee's employment terminates for 
any reason, including (without limitation) any termination prior to a Change 
of Control, the Employee shall not be entitled 


                                     -1-
<PAGE>

to any payments or benefits, other than as provided by this Agreement, or as 
may otherwise be available in accordance with the terms of Employee's offer 
letter from the Company dated < < Date > > (the "Offer Letter") and the 
Company's established employee plans and written policies at the time of 
termination.  The terms of this Agreement shall terminate upon the earlier of 
(i) the date on which Employee ceases to be employed as corporate officer of 
the Company, other than as a result of an involuntary termination by the 
Company without Cause (ii) the date that all obligations of the parties 
hereunder have been satisfied, or (iii) two (2) years after a Change of 
Control.  A termination of the terms of this Agreement pursuant to the 
preceding sentence shall be effective for all purposes, except that such 
termination shall not affect the payment or provision of compensation or 
benefits on account of a termination of employment occurring prior to the 
termination of the terms of this Agreement.

         2.  RESTRICTED STOCK AND STOCK OPTIONS.  Subject to Sections 5 and 6 
below, in the event of a Change of Control and regardless of whether the 
Employee's employment with the Company is terminated in connection with the 
Change of Control, each share of Common Stock held by Employee that is 
subject to the terms of a Restricted Stock Purchase Agreement ("Restricted 
Stock") and each stock option granted for the Company's securities 
(collectively referred to as the "Shares") held by the Employee shall become 
vested on the effective date of the transaction as to fifty percent (50%) of 
the Shares that have not otherwise vested as of such date.  Thereafter, so 
long as Employee remains employed by the Company (or a successor 
Corporation), the remaining 50% of the Shares that have not otherwise vested 
as of the Change of Control shall vest as follows:  (i) 25% of the Shares 
twelve (12) months after the Change of Control and (ii) 25% of the Shares 
eighteen (18) months after the Change of Control.  Each stock option shall be 
exercisable to the extent so vested in accordance with the provisions of the 
Option Agreement and Plan pursuant to which such option was granted and each 
Share of Restricted Stock shall be freely transferable to the extent so 
vested in accordance with the provisions of the Stock Purchase Agreement 
pursuant to which such stock was purchased by Employee.

         3.  CHANGE OF CONTROL.

             (a)  TERMINATION FOLLOWING A CHANGE OF CONTROL.  Subject to 
Section 5 below, if the Employee's employment with the Company is terminated 
at any time within two (2) years after a Change of Control, then the Employee 
shall be entitled to receive severance benefits as follows:

                   (i)  VOLUNTARY RESIGNATION.  If the Employee voluntarily 
resigns from the Company (other than as an Involuntary Termination (as 
defined below) or if the Company terminates the Employee's employment for 
Cause (as defined below)), then the Employee shall not be entitled to receive 
severance payments.  The Employee's benefits will be terminated under the 
Company's then existing benefit plans and policies in accordance with such 
plans and policies in effect on the date of termination or as otherwise 
determined by the Board of Directors of the Company.


                                     -2-
<PAGE>

                   (ii)  INVOLUNTARY TERMINATION.  If the Employee's 
employment is terminated as a result of an Involuntary Termination other than 
for Cause, the Employee shall be entitled to receive the following benefits:  
(i) severance payments during the period from the date of the Employee's 
termination until the date 12 months after the effective date of the 
termination (the "Severance Period") equal to the salary which the Employee 
was receiving at the time of such termination, which payments shall be paid 
during the Severance Period in accordance with the Company's standard payroll 
practices; (ii) a pro-rated amount of the Employee's "target bonus" for the 
fiscal year in which the termination occurs (or for the prior fiscal year if 
a target bonus has not yet been determined for the fiscal year in which the 
termination occurs), with such payment being made on the termination date; 
(iii) continuation of benefits through the end of the Severance Period 
substantially identical to those to which the Employee was entitled 
immediately prior to the termination, or to those being offered to officers 
of the Company, or a successor corporation, if the Company's benefit programs 
are changed during the Severance Period, unless Employee becomes eligible for 
comparable coverage through another employer, at which time the benefits 
coverage provided herein shall terminate; and (iv) full and immediate vesting 
of each unvested stock option granted for the Company's securities and each 
share of restricted stock held by the Employee on the date of termination so 
that each such option shall be exercisable in full on the termination date in 
accordance with the provisions of the Option Agreement and Plan pursuant to 
which such option was granted and each share of restricted stock shall be 
freely transferable by Employee.  For purposes of this Agreement, the term 
"target bonus" shall mean the Employee's base salary in effect on the 
termination date multiplied by that percentage of such base salary that is 
prescribed by the Company under its Executive Bonus Program as the percentage 
of such base salary payable to the Employee as a bonus if the Company pays 
bonuses at one-hundred percent (100%) of its operating plan.

                   (iii)  INVOLUNTARY TERMINATION FOR CAUSE.  If the 
Employee's employment is terminated for Cause, then the Employee shall not be 
entitled to receive severance payments.  The Employee's benefits will be 
terminated under the Company's then existing benefit plans and policies in 
accordance with such plans and policies in effect on the date of termination.

             (b)  TERMINATION APART FROM A CHANGE OF CONTROL.  In the event 
the Employee's employment terminates for any reason, either prior to the 
occurrence of a Change of Control or after the two year period following the 
effective date of a Change of Control, then the Employee shall not be 
entitled to receive any severance payments under this Agreement.  The 
Employee's benefits will be terminated under the terms of the Offer Letter 
and the Company's then existing benefit plans and policies in accordance with 
such plans and policies in effect on the date of termination or as otherwise 
determined by the Board of Directors of the Company.

         4.  DEFINITION OF TERMS.  The following terms referred to in this 
Agreement shall have the following meanings:


                                     -3-
<PAGE>

             (a)  CHANGE OF CONTROL.  "Change of Control" shall mean the 
occurrence of any of the following events:

                   (i)  MERGER AND CHANGE IN BOARD COMPOSITION.  A merger or 
consolidation of the Company whether or not approved by the Board of 
Directors of the Company, other than a merger or consolidation which would 
result in the voting securities of the Company outstanding immediately prior 
thereto continuing to represent (either by remaining outstanding or by being 
converted into voting securities of the surviving entity) at least fifty 
percent (50%) of the total voting power represented by the voting securities 
of the Company or such surviving entity outstanding immediately after such 
merger or consolidation combined with a change in the composition of the 
Board of Directors of the Company, as a result of which fewer than a majority 
of the directors are Incumbent Directors.  "Incumbent Directors" shall mean 
directors who either (A) are directors of the Company as of March 3, 1997 or 
(B) are elected, or nominated for election, to the Board of Directors of the 
Company with the affirmative votes of at least a majority of the Incumbent 
Directors at the time of such election or nomination (but shall not include 
an individual whose election or nomination is in connection with an actual or 
threatened proxy contest relating to the election of directors to the 
Company).

                   (ii)  LIQUIDATION; SALE OF ASSETS.  A plan of complete 
liquidation of the Company or an agreement for the sale or disposition by the 
Company of all or substantially all of the Company's assets was approved by 
the shareholders of the Company.

             (b)  CAUSE.  "Cause" shall mean (i) gross negligence or willful 
misconduct in the performance of the Employee's duties to the Company where 
such gross negligence or willful misconduct has resulted or is likely to 
result in substantial and material damage to the Company or its subsidiaries 
(ii) repeated unexplained or unjustified absence from the Company, (iii) a 
material and willful violation of any federal or state law; (iv) commission 
of any act of fraud with respect to the Company; or (v) conviction of a 
felony or a crime involving moral turpitude causing material harm to the 
standing and reputation of the Company, in each case as determined in good 
faith by the Board of Directors of the Company.

             (c)  INVOLUNTARY TERMINATION.  "Involuntary Termination" shall 
include any termination by the Company other than for Cause and the 
Employee's voluntary termination, upon 30 days prior written notice to the 
Company, following (i) a material reduction or change in job duties, 
responsibilities and requirements inconsistent with the Employee's position 
with the Company and the Employee's prior duties, responsibilities and 
requirements; (ii) any reduction of the Employee's base compensation (other 
than in connection with a general decrease in base salaries for most officers 
of the Company and any successor corporation); or (iii) the Employee's 
refusal to relocate to a facility or location more than 50 miles from the 
Company's current location. 


                                     -4-
<PAGE>

         5.  LIMITATION ON PAYMENTS.  In the event that the severance and 
other benefits provided for in this Agreement to the Employee (i) constitute 
"parachute payments" within the meaning of Section 280G of the Internal 
Revenue Code of 1986, as amended (the "Code") and (ii) but for this Section, 
would be subject to the excise tax imposed by Section 4999 of the Code, then 
the Employee's severance benefits under Sections 2 and 3(a)(ii) shall be 
payable either:

             (a)  in full, or 

             (b)  as to such lesser amount which would result in no portion 
of such severance benefits being subject to excise tax under Section 4999 of 
the Code,

whichever of the foregoing amounts, taking into account the applicable 
federal, state and local income taxes and the excise tax imposed by Section 
4999, results in the receipt by the Employee on an after-tax basis, of the 
greatest amount of severance benefits under Sections 2 and 3(a)(ii), 
notwithstanding that all or some portion of such severance benefits may be 
taxable under Section 4999 of the Code.  Unless the Company and the Employee 
otherwise agree in writing, any determination required under this Section 5 
shall be made in writing by the Company's independent public accountants (the 
"Accountants"), whose determination shall be conclusive and binding upon the 
Employee and the Company for all purposes.  For purposes of making the 
calculations required by this Section 5, the Accountants may make reasonable 
assumptions and approximations concerning applicable taxes and may rely on 
reasonable, good faith interpretations concerning the application of Section 
280G and 4999 of the Code.  The Company and the Employee shall furnish to the 
Accountants such information and documents as the Accountants may reasonably 
request in order to make a determination under this Section.  The Company 
shall bear all costs the Accountants may reasonably incur in connection with 
any calculations contemplated by this Section 5.

         6.  CERTAIN BUSINESS COMBINATIONS.  In the event it is determined by 
the Board, upon consultation with Company management and the Company's 
independent auditors, that the enforcement of any Section of this Agreement, 
including, but not limited to, Section 2 hereof, which allows for the 
acceleration of vesting of Shares upon the effective date of a Change of 
Control would preclude accounting for any proposed business combination of 
the Company involving a Change of Control as a pooling of interests, and the 
Board otherwise desires to approve such a proposed business transaction which 
requires as a condition to the closing of such transaction that it be 
accounted for as a pooling of interests, then any such Section of this 
Agreement shall be null and void.  For purposes of this Section 6, the 
Board's determination shall require the unanimous approval of the 
non-employee Board members.

         7.  SUCCESSORS.  Any successor to the Company (whether direct or 
indirect and whether by purchase, lease, merger, consolidation, liquidation 
or otherwise) to all or substantially all of the Company's business and/or 
assets shall assume the obligations under this Agreement and agree expressly 
to perform the obligations under this Agreement in the same manner and to the 
same extent as the Company would be required to perform such 


                                     -5-
<PAGE>

obligations in the absence of a succession.  The terms of this Agreement and 
all of the Employee's rights hereunder shall inure to the benefit of, and be 
enforceable by, the Employee's personal or legal representatives, executors, 
administrators, successors, heirs, distributees, devisees and legatees.

         8.  NOTICE.  Notices and all other communications contemplated by 
this Agreement shall be in writing and shall be deemed to have been duly 
given when personally delivered or when mailed by U.S. registered or 
certified mail, return receipt requested and postage prepaid.  Mailed notices 
to the Employee shall be addressed to the Employee at the home address which 
the Employee most recently communicated to the Company in writing.  In the 
case of the Company, mailed notices shall be addressed to its corporate 
headquarters, and all notices shall be directed to the attention of its 
Secretary.

         9.  MISCELLANEOUS PROVISIONS.

             (a)  NO DUTY TO MITIGATE.  The Employee shall not be required to 
mitigate the amount of any payment contemplated by this Agreement (whether by 
seeking new employment or in any other manner), nor, except as otherwise 
provided in this Agreement, shall any such payment be reduced by any earnings 
that the Employee may receive from any other source.

             (b)  WAIVER.  No provision of this Agreement shall be modified, 
waived or discharged unless the modification, waiver or discharge is agreed 
to in writing and signed by the Employee and by an authorized officer of the 
Company (other than the Employee).  No waiver by either party of any breach 
of, or of compliance with, any condition or provision of this Agreement by 
the other party shall be considered a waiver of any other condition or 
provision or of the same condition or provision at another time.

             (c)  WHOLE AGREEMENT.  No agreements, representations or 
understandings (whether oral or written and whether express or implied) which 
are not expressly set forth in this Agreement have been made or entered into 
by either party with respect to the subject matter hereof.  This Agreement 
supersedes any agreement of the same title and concerning similar subject 
matter dated prior to the date of this Agreement, and by execution of this 
Agreement both parties agree that any such predecessor agreement shall be 
deemed null and void.

             (d)  CHOICE OF LAW.  The validity, interpretation, construction 
and performance of this Agreement shall be governed by the laws of the State of 
California without reference to conflict of laws provisions.

             (e)  SEVERABILITY.  If any term or provision of this Agreement 
or the application thereof to any circumstance shall, in any jurisdiction and 
to any extent, be invalid or unenforceable, such term or provision shall be 
ineffective as to such jurisdiction to the extent of such invalidity or 
unenforceability without invalidating or rendering unenforceable the 
remaining terms and provisions of this Agreement or the application of such 
terms and provisions to circumstances other than those as to which it is held 
invalid or unenforceable, 


                                     -6-
<PAGE>

and a suitable and equitable term or provision shall be substituted therefor 
to carry out, insofar as may be valid and enforceable, the intent and purpose 
of the invalid or unenforceable term or provision.

             (f)  ARBITRATION.  Any dispute or controversy arising under or 
in connection with this Agreement may be settled at the option of either 
party by binding arbitration in the County of Santa Clara, California, in 
accordance with the rules of the American Arbitration Association then in 
effect.  Judgment may be entered on the arbitrator's  award in any court 
having jurisdiction.  Punitive damages shall not be awarded.

             (g)  LEGAL FEES AND EXPENSES.  The parties shall each bear their 
own expenses, legal fees and other fees incurred in connection with this 
Agreement.

             (h)  NO ASSIGNMENT OF BENEFITS.  The rights of any person to 
payments or benefits under this Agreement shall not be made subject to option 
or assignment, either by voluntary or involuntary assignment or by operation 
of law, including (without limitation) bankruptcy, garnishment, attachment or 
other creditor's process, and any action in violation of this subsection (h) 
shall be void.

             (i)  EMPLOYMENT TAXES.  All payments made pursuant to this 
Agreement will be subject to withholding of applicable income and employment 
taxes.

             (j)  ASSIGNMENT BY COMPANY.  The Company may assign its rights 
under this Agreement to an affiliate, and an affiliate may assign its rights 
under this Agreement to another affiliate of the Company or to the Company; 
provided, however, that no assignment shall be made if the net worth of the 
assignee is less than the net worth of the Company at the time of assignment. 
  In the case of any such assignment, the term "Company" when used in a 
section of this Agreement shall mean the corporation that actually employs 
the Employee.

             (k)  COUNTERPARTS.  This Agreement may be executed in 
counterparts, each of which shall be deemed an original, but all of which 
together will constitute one and the same instrument.

     IN WITNESS WHEREOF, each of the parties has executed this Agreement, in 
the case of the Company by its duly authorized officer, as of the day and 
year first above written.


METRA BIOSYSTEMS, INC.                       < < EMPLOYEE > >


By:______________________________            _______________________________

Title:___________________________



                                     -7-

<PAGE>
                                                                    EXHIBIT 11.1
 
                             METRA BIOSYSTEMS, INC.
                       COMPUTATION OF NET LOSS PER SHARE
                    (IN THOUSANDS EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                                         YEAR ENDED JUNE 30,
                                                                                  ---------------------------------
                                                                                     1997        1996       1995
                                                                                  ----------  ----------  ---------
<S>                                                                               <C>         <C>         <C>
Net loss........................................................................  $  (13,127) $  (21,399) $  (6,803)
                                                                                  ----------  ----------  ---------
                                                                                  ----------  ----------  ---------
Weighted average number of common shares outstanding............................      12,610      10,515        738
Mandatorily redeemable convertible preferred stock..............................      --          --          5,325
Number of common equivalents as a result of convertible warrants outstanding
  using the treasury stock method...............................................      --          --             10
Number of common shares issued and stock options granted in accordance with
  Staff Accounting Bulletin 83..................................................      --          --            230
                                                                                  ----------  ----------  ---------
Weighted average shares used to compute net loss per share......................      12,610      10,515      6,303
                                                                                  ----------  ----------  ---------
                                                                                  ----------  ----------  ---------
Net loss per share..............................................................  $    (1.04) $    (2.04) $   (1.08)
                                                                                  ----------  ----------  ---------
                                                                                  ----------  ----------  ---------
</TABLE>
 
    The calculation includes the shares of mandatorily redeemable convertible
preferred stock (Series A, Series B, Series C, Series D and Series E) and a
convertible warrant as if they had converted to common stock on their respective
original dates of issuance, because such shares automatically convert to common
stock upon the closing of the initial public offering of the Company's common
stock.

<PAGE>
                                                                    EXHIBIT 23.1
 
               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
 
    We consent to the incorporation by reference in the Registration Statement
(Form S-8 No. 33-99200) pertaining to the 1990 Incentive Stock Plan, the 1995
Stock Option Plan, the 1995 Employee Stock Purchase Plan, and the 1995
Directors' Stock Option Plan of our report dated July 16, 1997, with respect to
the consolidated financial statements and schedule of Metra Biosystems, Inc.
included in the Annual Report (Form 10-K) for the year ended June 30, 1997.
 
                                          ERNST & YOUNG LLP
 
Palo Alto, California
September 26, 1997

<PAGE>
                                                                    EXHIBIT 23.2
 
                  ACCOUNTANTS' CONSENT AND REPORT ON SCHEDULE
 
The Board of Directors and Shareholders
Metra Biosystems, Inc.
 
    The audits referred to in our report dated July 18, 1996, included the
related financial statement schedule as of June 30, 1996 and 1995, and for each
of the years in the two-year period ended June 30, 1996 included in the Form
10K. This financial statement schedule is the responsibility of the Company's
management. Our responsibility is to express an opinion on this financial
statement schedule based on our audits. In our opinion, such financial statement
schedule, when considered in relation to the basic consolidated financial
statements taken as a whole, presents fairly in all material respects the
information set forth therein.
 
    We consent to the incorporation by reference in the registration statement
on Form S-8 No. 33-99200 of our report dated July 18, 1996, with respect to the
consolidated balance sheet of Metra Biosystems, Inc. and subsidiaries as of June
30, 1996 and the related consolidated statements of operations, shareholders'
equity (deficit) and cash flows for each of the years in the two-year period
ended June 30, 1996, which report appears in the June 30, 1997 annual report on
Form 10-K of Metra Biosystems, Inc.
 
                                          KPMG Peat Marwick LLP
 
San Francisco, California
September 26, 1997

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE METRA
BIOSYSTEMS, INC. ANNUAL REPORT ON FORM 10-K FOR THE PERIOD ENDED JUNE 30, 1997
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<CASH>                                          11,709
<SECURITIES>                                    18,876
<RECEIVABLES>                                    1,576
<ALLOWANCES>                                         0
<INVENTORY>                                      1,446
<CURRENT-ASSETS>                                34,846
<PP&E>                                           4,182
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                  47,768
<CURRENT-LIABILITIES>                            4,117
<BONDS>                                              0
                                0
                                          0
<COMMON>                                            13
<OTHER-SE>                                      42,064
<TOTAL-LIABILITY-AND-EQUITY>                    47,768
<SALES>                                          6,405
<TOTAL-REVENUES>                                 6,725
<CGS>                                            3,982
<TOTAL-COSTS>                                   22,035
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                               (13,127)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (13,127)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (13,127)
<EPS-PRIMARY>                                   (1.04)
<EPS-DILUTED>                                   (1.04)
        

</TABLE>


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