OSTEX INTERNATIONAL INC /WA/
10-K405, 1998-04-01
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                       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 DECEMBER 31, 1997
                                     -- or --
            -----
                   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D)
            -----       OF THE SECURITIES EXCHANGE ACT OF 1934

                        FOR THE TRANSITION PERIOD FROM      TO
                                                       ----    ----

                                ---------------
                                     0-25250
                             COMMISSION FILE NUMBER

                            OSTEX INTERNATIONAL, INC.
              EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER

                               STATE OF WASHINGTON
          STATE OR OTHER JURISDICTION OF INCORPORATION OR ORGANIZATION

                                   91-1450247
                      I.R.S. EMPLOYER IDENTIFICATION NUMBER

          2203 AIRPORT WAY SOUTH, SUITE 400, SEATTLE, WASHINGTON 98134
                                  206-292-8082
           ADDRESS AND TELEPHONE NUMBER OF PRINCIPAL EXECUTIVE OFFICES

                                ---------------

          Securities registered pursuant to Section 12(b) of the Act:
                    (none)                        (none)
                TITLE OF CLASS        EACH EXCHANGE ON WHICH REGISTERED

           Securities registered pursuant to Section 12(g) of the Act:
                          COMMON STOCK, $.01 PAR VALUE
                                 TITLE OF CLASS
                                ---------------

    Indicate  by  checkmark  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),              Yes [ X ]   
and (2) has been subject to such filing requirements for 
the past 90 days.                                           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  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.                                    [   ]    

                                ---------------

    The  aggregate  market  value of the  voting  and  non-voting  stock held by
non-affiliates  of the  registrant  was  approximately  $23,308,000 on March 17,
1998, based on the per-share closing price of $2.28 on the Nasdaq Stock Market.

                The number of shares of Common Stock outstanding as of March 27,
1998 was 12,696,250.

                                ---------------
                       DOCUMENTS INCORPORATED BY REFERENCE

(1) Portions of the  Registrant's  Annual Report to Shareholders  for the fiscal
year ended December 31, 1997 is  incorporated  by reference into Part I, Part II
and Part III of this Form 10-K. 
(2)  Portions of the  Registrant's  Proxy  Statement  for the  Registrant's
Annual  Shareholders  Meeting  to be held  Monday,  May 18,  1998,  to be  filed
pursuant to Regulation  14A is  incorporated  by reference into Part III of this
Form 10-K.




<PAGE>



                            OSTEX INTERNATIONAL, INC.

                               INDEX TO FORM 10-K

                                     PART I

                                                               PAGE
                                                               ----
ITEM 1 -   BUSINESS                                              2

ITEM 1A -  RISK FACTORS                                          4

ITEM 1B -  EXECUTIVE OFFICERS OF THE REGISTRANT                  8

ITEM 2 -   PROPERTIES                                            9

ITEM 3 -   LEGAL PROCEEDINGS                                     9

ITEM 4 -   SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS   9

                                     PART II

ITEM 5 -   MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED 
           SHAREHOLDER MATTERS                                   10

ITEM 6 -   SELECTED FINANCIAL DATA                               10

ITEM 7 -   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL 
           CONDITION AND RESULTS OF OPERATIONS                   10

ITEM 8 -   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA           10

ITEM 9 -   CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON 
           ACCOUNTING AND FINANCIAL DISCLOSURE                   10

                                    PART III

ITEM 10 -  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT    11

ITEM 11 -  EXECUTIVE COMPENSATION                                11

ITEM 12 -  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS 
           AND MANAGEMENT                                        11

ITEM 13 -  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS        11

                                     PART IV

ITEM 14 -  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS 
           ON FORM 8-K                                           12

SIGNATURES                                                       16





<PAGE>




<PAGE>



For the purpose of this Form 10-K,  the following  capitalized  terms shall have
the following meanings:

       "Company" or "Ostex" shall mean Ostex International, Inc., a Washington 
       corporation;

       "Annual Report to Shareholders"  shall mean the annual report to 
shareholders of Ostex  International, Inc. for the year ended December 31, 
1997; and

       "Proxy   Statement"   shall  mean  the  proxy   statement  for  the  1998
shareholders  meeting of Ostex  International,  Inc. to be held Monday,  May 18,
1998, to be filed with the Securities and Exchange Commission (the "Commission")
pursuant to Regulation 14A.




                                     PART I

ITEM 1.    BUSINESS

       Ostex was incorporated in the State of Washington in 1989. The Company is
engaged in the  discovery  and  commercialization  of products  associated  with
osteoporosis and other collagen-related  diseases. The Company believes that its
lead product, the OSTEOMARK -registered trademark- test, incorporates 
breakthrough technology in the area of bone resorption  measurement.  Ostex
has   formed   collaborative   relationships   with   leading   diagnostic   and
pharmaceutical  companies to aid in the  commercialization  of Osteomark.  As of
December 31, 1997, the Company had 56 employees.

       Osteoporosis is a significant  health problem.  According to the National
Osteoporosis  Foundation (the "NOF"),  osteoporosis  afflicts  approximately  28
million people in the U.S. alone. Additionally millions of people are at risk of
skeletal  degradation  associated  with  Paget's  disease of bone,  cancer  that
metastasizes  to  bone,  hyperparathyroidism  (overactivity  of the  parathyroid
gland, characterized by a reduction of bone mass) and renal osteodystrophy.  In
spite  of  the  serious  human  and  economic  consequences  of  these  diseases
(according  to the NOF, the direct  healthcare  and indirect  lost  productivity
costs of osteoporosis  exceed $10 billion annually in the U.S.  alone),  medical
intervention usually commences only after pain, immobility,  fractures, or other
symptoms have appeared. The Company expects the osteoporosis  therapeutic market
will increase significantly.  The Company also believes new therapeutic products
are under development for osteoporosis, some of which are in late-stage clinical
trials,  and  that  the  Osteomark  test can be used to  effectively  predict  a
patient's  response to osteoporosis  therapy and monitor existing  therapies and
other therapies which may be developed.

       The Company is the exclusive licensee of the Osteomark technology,  known
clinically  as the NTx assay,  which is a urine test that can aid in  healthcare
decision-making  at  early  menopause  and  beyond.  The  Osteomark  assay  is a
non-invasive  diagnostic  test which  quantitatively  indicates the level of
bone  resorption.  Individuals  who are losing bone collagen at accelerated
rates may indicate a condition  which  typically  results in  osteoporosis.  The
Company  believes that early  identification  of high levels of bone  resorption
provides the opportunity to predict skeletal  response (bone mineral density) to
hormonal resorptive therapy in postmenopausal  women and helps prevent the onset
of  osteoporosis.  The  Company  also  believes  that the  Osteomark  assay aids
clinicians   in   monitoring   the  effects  of   antiresorptive   therapies  in
postmenopausal  women,  as well as in  older  patients  who  have  already  lost
significant bone mass.

       On May  8,  1995,  the  Company's  Osteomark  assay  became  commercially
available in the United States as a urinary  assay that provides a  quantitative
measure of the excretion of cross-linked N-telopeptides of Type I collagen (NTx)
as an indicator of human bone resorption,  and in July 1996 the Company received
expanded claims from the Food and Drug Administration (the "FDA") for the assay.
The 1996 claims allow that an Osteomark test measurement,  if taken prior to the
initiation  of  hormonal  antiresorptive  therapy,  can be utilized to predict a
patient's  response to that  therapy,  in terms of its effect on  bone
mineral  density.  Additionally,  the claims allow that the test can be used for
therapeutic  monitoring of antiresorptive  therapies in postmenopausal women, as
well as individuals  diagnosed with  osteoporosis and Paget's  disease,  and for
therapeutic  monitoring  of  estrogen-suppressing  therapies.  In March 1998 the
claims were further  expanded by allowing  that, in addition to the 1996 claims,
an Osteomark test  measurement  can identify the  probability  for a decrease in
bone mineral density in postmenopausal women taking calcium supplements
relative to those treated with antiresorptive therapy.

<PAGE>

       The Company is manufacturing  and marketing the Osteomark assay initially
in an  Enzyme-linked  Immunosorbent  Assay  ("ELISA")  format for testing  urine
samples.  Worldwide  promotion of the Osteomark  test kits is also  supported by
Johnson & Johnson Clinical Diagnostics,  Inc. ("Johnson & Johnson"). In 1995 the
Company entered into research,  development,  license and supply agreements with
Johnson &  Johnson.  These  agreements  grant  Johnson  &  Johnson a license  to
manufacture,  sell and distribute certain products using Ostex's bone resorption
technology.  Currently,  Johnson & Johnson  distributes in the United States and
certain foreign  countries the Osteomark assay in the existing  microtiter plate
format and is adapting the urine assay for use with its automated analyzer.  The
companies  intend to adapt the serum assay for use on  high-speed,  high volume,
automated instruments typically used in large clinical laboratories.  Ostex will
receive  royalties on Johnson & Johnson's  sales of products  incorporating  the
Ostex technology.

       Under the Johnson & Johnson license agreement,  the Company has the right
to license its technology for use on automated  instruments to one other company
in addition  to Johnson & Johnson.  The Company is  currently  evaluating  other
potential  collaborators  to adapt  the  Osteomark  assay  to  other  high-speed
automated instruments.

       In the year ended  December 31, 1997,  the  Company's  largest  customer,
Johnson & Johnson,  accounted for  approximately  24% of the  Company's  product
sales  and  research  testing   services.   The  termination  of  the  Company's
relationship  with Johnson & Johnson could have a material adverse effect on the
Company's results of operations.

       Ostex has also entered into a research and  development  agreement  and a
license agreement with Mochida Pharmaceutical Co., Ltd. ("Mochida"),  a Japanese
pharmaceutical  company,  for the  commercialization  of the Osteomark  assay in
Japan.  Under the research and development  agreement,  Mochida has an option to
license the NTx serum assay and has paid Ostex $3,350,000 in development fees to
date.  Future  payments of $750,000  under the  agreement  are  contingent  upon
Mochida's decision to exercise its option.  Under the license  agreement,  Ostex
granted Mochida  exclusive  marketing and  distribution  rights to certain Ostex
products in Japan.  Since 1992,  Mochida has paid Ostex  $2,500,000 in licensing
fees for the  Osteomark  assay.  In January 1998 Mochida  launched the Osteomark
assay in Japan for the management of patients with  hyperparathyroidism  and for
patients with  metastatic  bone tumors.  Ostex will to sell Mochida the critical
reagents to be assembled into finished products in Japan by Mochida.

       The Company also plans to develop the Osteomark  assay in other  formats,
including  formats suitable for use in the physician's  office.  The Company has
entered into agreements with Hologic,  Inc.  ("Hologic"),  a worldwide leader in
X-ray and ultrasound bone  densitometers  used to measure bone density to assist
in the diagnosis and monitoring of  osteoporosis  and other bone  diseases,  and
Metrika,  Inc.  ("Metrika"),  a diagnostic device company,  to develop physician
office "point-of-care" Osteomark assay devices.

         The Company and Metrika are  developing  a  point-of-care  NTx test as
an indicator of bone resorption  which uses a hand-held,  fully  disposable
device that computes NTx values and displays them digitally. Additionally, Ostex
and Hologic are developing a low-cost point-of-care NTx test for bone resorption
based on the Osteomark assay pursuant to a joint  development  agreement.  Under
this agreement, the companies,  working with Serex, Inc. ("Serex"), will develop
and  market  a  point-of-care   Osteomark  test,  utilizing  Serex's  strip-test
technology and a hand-held, battery-operated meter that computes NTx values upon
insertion of the strip.  Ostex  believes  that the joint product will reduce the
cost and simplify the process of obtaining patient results.

       OSTEOMARK  and OSTEX are  registered  United  States  trademarks of Ostex
International,  Inc. The Company has also registered its OSTEOMARK  trademark in
42 other countries. Additional trademark applications are pending.

       The Company's collagen resorption assay technology is covered by 17 U. S.
patents,  2 European  patents,  2  Australian  patents,  and  patents in Canada,
Ireland, Spain, Hong Kong, and Singapore. The European patents are in opposition
proceedings  before the European Patent Office.  Additional patent  applications
are pending in Japan and elsewhere.

       The Company's  research and development  expenditures,  all of which were
funded by the Company, totaled $4,470,000,  $3,163,000, and $3,200,000, in 1997,
1996, and 1995, respectively.


<PAGE>

       The Company's foreign product sales, all to  non-affiliates,  totaled 
$652,000,  $370,000,  $528,000,  in 1997, 1996 and 1995, respectively.  
Foreign sales were primarily to Europe and Japan.

         The Company is in the latter stages of adapting the Osteomark  assay to
a serum format. The Company believes that the use of a serum NTx test provides a
number of advantages to testing  laboratories,  including the elimination of the
requirement  to  normalize  NTx  values  to  creatinine   concentration  and  to
ultimately  perform NTx testing on random  access,  automated  analyzers.  Ostex
plans to  initiate  clinical  studies  of its serum NTx test in an ELISA  format
during the second quarter of 1998.

         The Company is  developing  an assay for Type II collagen  degradation.
This  type  of  collagen   is  a  primary   constituent   of  joint   cartilage.
Osteoarthritis,  a  degenerative  disease of joint  cartilage,  affects  over 15
million  people in the United  states  alone.  The  disease  first  appears in a
limited  number  of  joints.  The  first  symptom,   joint  pain,  occurs  after
substantial  cartilage damage has taken place.  Eventually,  pain and tenderness
increase and the joint  motion  becomes  diminished.  The Ostex Type II collagen
assay under development has been designed to allow reliable  monitoring of joint
cartilage  changes for validating the  effectiveness of drugs under  development
and for identifying patients with early-stage  disease. In addition,  similar to
the Osteomark assay used in connection with  osteoporosis,  the Company believes
that the Type II assay will aid in the  clinical  management  of  osteoarthritis
patients by monitoring the effectiveness of therapy.

         Ostex  is  investigating  the use of its NTx  test  in  cancer  patient
management. Independent researchers have shown that the level of bone resorption
increases  significantly when cancer metastasizes to bone. A patient's NTx level
may be useful to identify  cancer  patients  with high bone  turnover  who might
warrant a bone scan to confirm  the stage  (degree  of  spread) of the  disease.
The  American  Cancer  Society  estimated  that over  200,000  new cases of
prostate  cancer would be diagnosed in 1997,  with 60%-80%  progressing  to bone
metastases.

         Ostex is also in the early stages of  developing an assay for measuring
Type III collagen degradation. Type III collagen is a significant constituent of
blood vessels such as coronary arteries.  Measuring  degradation of this type of
collagen may be useful in identifying cardiovascular disease.

ITEM 1A. RISK FACTORS

     When   used  in  this   discussion,   the  words   "believes,"   "intends,"
anticipates,"  "plans to" and "expects" and similar  expressions are intended to
qualify as  forward-looking  statements.  Such statements are subject to certain
risks and  uncertainties  and there are a number of important factors that could
cause actual results to differ  materially from those  projected.  These factors
include, among others, the factors described under "Management's  Discussion and
Analysis of Financial  Condition and Results of  Operations--Other  Factors that
May Affect  Operating  Results" in the Company's  Annual Report to  Shareholders
(which  discussion  has been  incorporated  herein  by  reference)  and the risk
factors set forth below.  Readers are cautioned  not to place undue  reliance on
such  forward-looking  statements,  which speak only as of the date hereof.  The
Company  undertakes  no  obligation  to  release  publicly  the  results  of any
revisions to such forward-looking  statements that may be made to reflect events
or  circumstances  after  the  date  hereof  or to  reflect  the  occurrence  of
unanticipated events.

UNCERTAINTY OF MARKET ACCEPTANCE

       The Company's  lead product,  the Osteomark  assay,  became  commercially
available  in May 1995 in the  United  States  and  sales of this  product  have
increased  over time.  However,  there can be no  assurance  that the  Company's
Osteomark  assay or any of its  other  products  will gain  acceptance  from the
medical community, clinical or hospital laboratories,  physicians or patients as
readily as other forms of diagnosis or any newly developed diagnostic. There can
be no  assurance  that the Company  will be able to develop  significant  market
share for its products,  or any market share at all. Inability of the Company to
achieve market  acceptance for its products would have a material adverse effect
on the Company's business, financial condition and results of operation.

DEPENDENCE ON CORE TECHNOLOGY; UNCERTAINTY OF ADAPTATION TO DIFFERENT FORMATS

       The Company currently relies exclusively upon its core technology for the
development  of  diagnostic  products  associated  with  osteoporosis  and other
collagen-related  diseases.  There can be no assurance  that  competitors of the
Company  will  not  be  successful  in  developing  new  or  more  efficient  or
cost-effective  diagnostics  that are more readily  accepted  than the Company's
products.  The Company is in the process of undertaking  ongoing and significant
additional  research  and  development  to adapt  its core  technology  to serum
testing and to different formats,  instruments and other delivery platforms that
currently  exist or may be developed.  In  particular,  additional  research and
development  will be  required  to adapt  its  core  technology  to  high-speed,
high-volume  automated instruments typically used in large clinical laboratories


<PAGE>

or  companies  through  which the  Company may seek to expand the market for its
products.  There can be no  assurance  that the Company  will be  successful  in
adapting and further  developing  its core  technology  to meet such needs.  The
Company is developing physician office adaptations of its core technology. There
can be no assurance  that the Company or its  development  partners  will either
successfully develop or obtain required regulatory approval for a cost-effective
instrument  for  physician  office use. In  addition,  technological  changes or
medical advancements could diminish or eliminate the commercial viability of the
Osteomark assay or future products based upon the Company's core technology. The
failure to adapt the Company's core technology to different formats, instruments
and  other  delivery   platforms,   or  otherwise  to  commercialize  such  core
technology,  would have a material  adverse  effect on the  Company's  business,
financial condition and results of operation.

RELIANCE ON COLLABORATIVE AGREEMENTS AND CERTAIN RELATIONSHIPS

     The Company has entered into  collaborative  or  co-promotional  agreements
with several  partners,  including,  among others,  Johnson & Johnson,  Mochida,
Hologic,  Wyeth-Ayerst  Laboratories,and Metrika and intends to appoint a second
international  distributor for its NTx test on automated instruments.  The level
of each partner's involvement and support and the amount and timing of resources
that these  collaborators  devote to these activities are not within the control
of the Company and can significantly impact the Company's ability to achieve its
objectives.  There can be no  assurance  that these  collaborators  will perform
their  contractual  obligations  as expected or that the Company will derive any
additional  revenue from such  arrangements.  Moreover,  the  agreements  may be
terminated under certain circumstances. The Company expects to rely on these and
additional  agreements to develop and commercialize  its future products.  There
can be no  assurance  that  the  Company  will be able to  negotiate  acceptable
collaborative  agreements in the future or that such new  agreements or existing
agreements will be successful.  In addition,  there can be no assurance that the
parties to the agreements will not pursue alternative technologies.

       In the year ended  December 31, 1997,  the  Company's  largest  customer,
Johnson & Johnson,  accounted for  approximately  24% of the  Company's  product
sales  and  research  testing   services.   The  termination  of  the  Company's
relationship  with Johnson & Johnson could have a material adverse effect on the
Company's results of operations.

LIMITED SALES AND MARKETING EXPERIENCE

       The Company has limited experience in sales,  marketing and distribution.
To market any of its products directly, the Company must develop and implement a
substantial  marketing and sales effort with technical  expertise and supporting
distribution capability.  The Company intends to continue to market and sell its
products in the U.S.  through  national  distributors  and its own limited sales
force and to market and sell its products in other markets through  distributors
or collaborative  arrangements.  There can be no assurance that the Company will
be able to establish effective sales and distribution capabilities or that it or
its  collaborators  will be  successful  in gaining  market  acceptance  for the
Company's  products or that the  Company  will  achieve or maintain  significant
market share for its products.

DEPENDENCE ON LICENSED PATENTS AND PROPRIETARY RIGHTS

       The Company's  success depends,  in large part, on its current and future
patent position  relating to its core technology.  The Company's patent position
involves  complex  legal and factual  questions.  The  Company is the  exclusive
licensee  of certain  patents  within and  outside of the U.S.  relating  to the
Company's core technology. The Company is dependent upon the Washington Research
Foundation  (the  "WRF") for the filing and  prosecution  of patents  and patent
applications licensed to the Company.  Claims made under patent applications may
be  denied  or  significantly  narrowed,  and  issued  patents  may not  provide
significant commercial protection to the Company. There is no assurance that the
Company's patents will not be successfully challenged or circumvented by others.
The Company could incur substantial costs in proceedings  before the U.S. Patent
Office, including interference proceedings.  These proceedings could also result
in adverse  decisions  as to the  patentability  of the  Company's  licensed  or
assigned  inventions.  There can be no assurance that the Company's  products do
not or will not  infringe  on the patent or  proprietary  rights of others.  The
Company may be required  to obtain  additional  licenses to the patents or other
proprietary  rights of others.  The Company may also require  licenses  from the
inventors of certain  processes,  technologies  and delivery formats in order to
successfully  market certain  products.  There can be no assurance that any such
licenses would be made available on terms acceptable to the Company,  if at all.
If the  Company  needs and cannot or does not  obtain  such  licenses,  it could
encounter delays in product  introductions  while it attempts to circumvent such
patents or the  development,  manufacture,  or sale of products  requiring  such
licenses  could be  precluded.  The Company  believes  there will continue to be
significant  litigation in the industry  regarding patent and other intellectual
property rights.


<PAGE>

       The Company is aware of competitors that are developing products that may
be covered by claims  made in patents  or patent  applications  of the  Company.
Because certain foreign patents are subject to third-party  opposition following
the date of grant of such patents,  there can be no assurance that claims of the
Company's foreign patents,  once granted,  will survive such opposition  without
cancellation  or  significant   modification.   Because  U.S.  applications  are
confidential  until a patent  issues,  the  Company  cannot be assured  that its
patent  claims  have  priority  in the  U.S.  or  will  be  entitled  to  patent
protection.

       The Company also relies on trade secrets and other unpatented proprietary
technology.  No assurance can be given that the Company can meaningfully protect
its rights in such unpatented  technology or that others will not  independently
develop substantially equivalent products and processes or otherwise gain access
to the Company's technology.  The Company seeks to protect its trade secrets and
proprietary  know-how,  in  part,  with  confidentiality   agreements  with  its
employees and consultants.  There can be no assurance that these agreements will
not be breached, that the Company will have adequate remedies for any breach, or
that  the  Company's  trade  secrets  will  not  otherwise  become  known  or be
independently  developed  by  competitors.  In addition,  protracted  and costly
litigation  may be necessary to enforce and  determine the scope and validity of
the Company's proprietary rights.

LENGTHY REGULATORY PROCESSES AND UNCERTAINTY OF REGULATORY APPROVALS

       The process of obtaining FDA and other required regulatory  clearance can
be lengthy and expensive.  The time required for FDA approvals is uncertain, and
often depends on the type,  complexity and novelty of the product.  There can be
no  assurance  that the FDA will act  favorably  or quickly in its review of any
submission  by  the  Company,  and  significant  difficulties  or  costs  may be
encountered  by the  Company in its efforts to obtain FDA clearance  that could
delay or preclude the Company from  marketing its products.  Furthermore,  there
can be no assurance that the FDA will not request the  development of additional
data following original  submissions,  causing the Company to incur further cost
and delay.  Nor can there be any  assurance  that the FDA will not  restrict the
intended use of a submitted product as a condition for clearance.

       If the FDA  concludes  that a device is not  substantially  equivalent to
another legally marketed device, submission of a pre-market approval application
("PMA") will be required.  If the FDA  indicates  that a PMA is required for any
product of the Company,  the application  will require  submission of results of
clinical studies and manufacturing  information,  and likely a review by a panel
of experts  outside of the FDA.  Clinical  studies would need to be conducted in
accordance  with FDA  requirements.  The failure to comply  would  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)
"device"   premarket   notification   procedure  to   demonstrate   "substantial
equivalence"  to a legally  marketed  product.  Further,  if a company wishes to
propose  modifications  to a  product  subsequent  to  FDA  approval  of  a  PMA
application, including changes in indications or other significant modifications
to labeling,  or modifications  to the  manufacturing  process,  or if a company
wishes to change its  manufacturing  facility,  a PMA  supplement  must first be
submitted to the FDA for its review and approval.

EXTENSIVE CONTINUING GOVERNMENT REGULATION

       The research,  development,  manufacturing and marketing of the Company's
products are subject to extensive continuing regulation by numerous governmental
authorities  in the U.S.  and certain  other  countries,  and the  Company,  its
products,  and its manufacturing  facilities are subject to continual review and
periodic  inspection.  The regulatory  standards for  manufacturing  are applied
stringently by the FDA. Discovery of previously unknown problems with a product,
manufacturer,  or  facility  may  result  in  restrictions  on such  product  or
manufacturer  or facility,  including  warning  letters,  fines,  suspensions of
regulatory  approvals,  product  recalls,  operating  restrictions,   delays  in
obtaining new product approvals,  withdrawal of the product from the market, and
criminal prosecution. Other violations of FDA requirements can result in similar
penalties.  The Company is also  subject to numerous  environmental,  health and
workplace  safety laws and  regulations,  including those  governing  laboratory
procedures,  exposure to blood-borne pathogens, and the handling of biohazardous
materials.  Any violation of, and the cost of  compliance  with,  these laws and
regulations  could  adversely  impact the Company's  operations.  The Company is
unable to predict the extent or likelihood of adverse government regulation that
might arise from future U.S. or foreign government action.


<PAGE>

LIMITED MANUFACTURING EXPERIENCE

         The Company is developing adaptations of its core technology for use in
physicians'  offices and  depends  upon the  efforts of  collaborators  for this
development.  Such  adaptations  have not been  completed  and  there  can be no
assurance  that, if  developed,  such  adaptations  could be  manufactured  in a
commercially  viable manner.  Unless the Company  develops  additional  in-house
manufacturing  capability for such  products,  it will be dependent upon outside
sources for the manufacture of such products. There can be no assurance that the
Company's reliance on others for the manufacture of its products will not result
in problems with product supply.  Interruptions  in the availability of products
could delay or prevent the development and commercial marketing of the Company's
products.

HISTORY OF LOSSES AND LIMITED OPERATING HISTORY

       The Company has a limited  operating  history and had a retained  deficit
through  December 31, 1997 of $24,128,000.  For the year-end  December 31, 1997,
the Company had a net loss of $2,264,000 ($8,464,000,  excluding a non-recurring
receipt of $6,200,000 from the settlement of a dispute with Boehringer  Mannheim
GmbH. The Company expects to incur additional substantial costs as it continues
with its operations, marketing efforts, research and development activities, and
clinical  trials.  The Company  expects to  continue  to incur  losses in future
periods and the Company is unable to predict  when,  if at all, it will  achieve
profitability.

FUTURE CAPITAL NEEDS AND UNCERTAINTY OF ADDITIONAL FINANCING

       The Company will continue to require  substantial  funds for research and
development, general and administration,  and the marketing of its products. The
amount of the Company's future capital requirements will depend on many factors,
including  the status of the  development  of its  products,  the time and costs
involved  in  obtaining  regulatory  approvals,  the costs  involved  in filing,
prosecuting  and enforcing  patent claims,  competing  technological  and market
developments,  the ability of the Company to maintain existing collaborative and
licensing  arrangements,  and  the  ability  of the  Company  to  establish  new
collaborative and licensing arrangements.  The Company expects that its existing
capital  resources will be sufficient to fund the Company's  activities  through
1999. However,  the Company may be required to seek additional  financing before
the end of 1999.  There  can be no  assurance  that  additional  funds,  whether
through  additional  financings,   collaborative   arrangements  with  corporate
sponsors or other sources,  will be available,  if at all, in a timely manner or
on terms  acceptable to the Company.  If adequate funds are not  available,  the
Company  may be required to delay,  scale back or  eliminate  one or more of its
programs  or obtain  funds  through  arrangements  that are  unfavorable  to the
Company.

INTENSE COMPETITIVE ENVIRONMENT

       Competition   from   biotechnology   companies,   diagnostic   companies,
pharmaceutical  companies and research and academic  institutions is intense.  A
number of diagnostic  tests and  procedures,  and other  non-invasive  tests for
osteoporosis  and  other  bone  disorders  currently  exist  and  others  are in
development, and the manufacturers of these tests will continue to improve them.
In addition,  the diagnostic industry is subject to rapid technological  change.
There can be no assurance  that the  Company's  competitors  will not succeed in
developing  products that are more  effective  than those which have been or are
being  developed  by the  Company  or which  would  render  the  Company's  core
technology obsolete or non-competitive.  Many of the Company's  competitors have
substantially greater financial, technical and human resources than the Company.
In addition, many of these competitors have significantly greater experience and
resources than the Company in undertaking  clinical trials and other  regulatory
approval  procedures  as  well  as  in  marketing  and  achieving  manufacturing
efficiencies.   There  are  also   small   companies,   academic   institutions,
governmental  agencies  and other  research  organizations  that are  conducting
research in the area of osteoporosis and other collagen-related  diseases. These
entities  may also  market  commercial  products  either on their own or through
collaborative  efforts.  The Company's  competitors may develop technologies and
products that are  available  for sale prior to the  Company's  products or at a
lower cost or with better  technical  characteristics  rendering  the  Company's
products less competitive.

DEPENDENCE ON THERAPEUTICS DEVELOPED BY OTHERS

       Acceptance of and demand for the diagnostic  products that the Company is
developing  will be affected by the need  perceived  by  physicians  to diagnose
bone,  cartilage and connective  tissue disorders for the purposes of treatment.
There  are  currently  a limited  number  of  therapies  that are  effective  in
preventing osteoporosis or other bone, cartilage or connective tissue disorders,
or in treating these disorders once diagnosed. In the event new therapies do not
receive regulatory approval or experience delayed market acceptance, the Company
could be adversely affected.  Unfavorable  publicity concerning a product of the

<PAGE>

Company or  therapeutic  products  for  osteoporosis  could also have an adverse
effect on the  Company's  ability to obtain  regulatory  approvals or to achieve
market acceptance.

UNCERTAINTY OF HEALTHCARE REIMBURSEMENT

       The Company's  ability to commercialize  its products will depend in part
on the extent to which  reimbursement  for the cost of such products and related
treatment will be available from third-party  payors,  such as government health
administration   authorities,   private  health  coverage   insurers  and  other
organizations.  The  status of the scope of  healthcare  programs  worldwide  is
uncertain and there can be no assurance that adequate  third-party coverage will
be available for the Company to maintain price levels sufficient for realization
of an appropriate return on its investment in product  development.  Third-party
payors are increasingly  challenging the price and cost effectiveness of medical
products and services.  If the Company succeeds in bringing one or more products
to the market,  there can be no assurance that these products will be considered
cost  effective  and that  reimbursement  to the  consumer  will be available or
sufficient to allow the Company to sell its products on a competitive basis.

VOLATILITY OF STOCK PRICE

       The volatility of the Company's stock price has been significant since it
first became  publicly  traded in January 1995.  The stock market may experience
significant price and volume fluctuations unrelated to the operating performance
of particular companies. Factors such as any loss of key management, the results
of the Company's clinical trials or those of its competitors, adverse regulatory
actions or decisions, evidence regarding the safety or efficacy of the Company's
products or those of its competitors, announcements of technological innovations
or new  products by the  Company or its  competitors,  governmental  regulation,
developments  with respect to patents or other  proprietary  rights,  product or
patent  litigation or public  concern as to the safety of products  developed by
the  Company  may have a volatile  effect on the market  price of the  Company's
Common Stock.


ITEM 1B.   EXECUTIVE OFFICERS OF THE REGISTRANT

The executive officers of the Company and their ages are as follows:

NAME                      AGE                POSITION
- -----                     ---                --------
Thomas A. Bologna         49       President and Chief Executive Officer

Thomas F. Broderick       49       Vice President, Patent and General Counsel

Donna J. DeLong           49       Vice President, Marketing

Robert M. Littauer        49       Senior Vice President, Finance and 
                                   Administration and Secretary

Nancy J.S. Mallinak       36       Vice President, Regulatory and Clinical 
                                   Affairs

William K. Strelke        44       Vice President, Sales

       There were no family relationships  between any executive officers of the
Company.

       THOMAS A. BOLOGNA  joined the Company in July 1997 as the  President  and
Chief Executive Officer and as a member of the Board of Directors.  From January
1996  until  July  1997  Mr.  Bologna  was a  principal  in  Healthcare  Venture
Associates, a consulting firm. From January 1994 to January 1996 Mr. Bologna was
President and Chief  Executive  Officer for Scriptgen  Pharmaceuticals,  Inc., a
biotechnology  company  with  proprietary  drug  screening  technology  that  is
developing  orally active drugs to regulate gene expression,  and from July 1987
to January  1994 Mr.  Bologna  was the  Chairman of the Board of  Directors  and


<PAGE>

President and Chief Executive Officer of Gen-Probe Incorporated, a biotechnology
company  commercializing   genetic-probe-based  technology  for  diagnostic  and
therapeutic applications.

       THOMAS F.  BRODERICK  was named the Vice  President,  Patent and  General
Counsel  in  November  1997.  Mr.  Broderick  was Vice  President,  Intellectual
Property from March 1997 to November 1997 and was Patent Counsel for the Company
from April 1996 to March 1997.  From 1989 to March  1996,  Mr.  Broderick  was a
partner at the patent law firm of Christensen,  O'Connor,  Johnson & Kindness in
Seattle, Washington.

       DONNA  DELONG  joined the  Company in  February  1998 as Vice  President,
Marketing.  From May 1996 to February  1998,  Ms. DeLong was Senior  Director of
Marketing at Chiron Diagnostics,  a division of Chiron Corporation, a healthcare
company;  from  October  1993 to April of 1996,  Ms.  DeLong was the Director of
Marketing at Neopath Inc., a medical diagnostics  company;  and from May 1990 to
October 1993 Ms.  DeLong was the  Director of  Marketing  at Sanofi  Diagnostics
Pasteur, a medical diagnostics company.

       ROBERT M.  LITTAUER  joined the Company in September  1996 as Senior Vice
President, Finance and Administration, and was appointed the Corporate Secretary
in November  1997.  From 1987 to September  1996,  Mr.  Littauer was Senior Vice
President,  Chief  Financial  Officer  and  Treasurer  of NeoRx  Corporation,  a
biotechnology   company   developing   therapeutic   products   for  cancer  and
cardiovascular diseases.

       NANCY J.S.  MALLINAK was named Vice  President,  Regulatory  and Clinical
Affairs of the Company in February 1997. Ms.  Mallinak was Director,  Regulatory
and  Clinical  Affairs for the Company  from June 1995 to February  1997 and was
Manager,  Regulatory and Clinical  Affairs for the Company from December 1992 to
June 1995. From June 1989 to December 1992, Ms.  Mallinak was Manager,  Clinical
Product  Development in the Diagnostics Group of Baxter  International,  Inc., a
general healthcare company.

       WILLIAM K. STRELKE was named Vice  President,  Sales in November 1997. Mr
Strelke was Vice  President,  Sales and  Marketing  for the Company from October
1994 to  November  1997,  and was the  Director of Sales and  Marketing  for the
Company from January 1994 to October 1994.  Prior to joining Ostex,  Mr. Strelke
served  from March 1993 to  January  1994 at  Mitchell  International,  Inc.,  a
healthcare  facility design and construction  consulting  company,  where he was
Vice  President  and Regional  Director.  From  January 1983 to March 1993,  Mr.
Strelke held various  positions with  responsibility  for sales and distribution
management  with  the  Scientific  Products  Division  of  Baxter  International
(previously American Hospital Supply Corporation), a general healthcare company.


ITEM 2.     PROPERTIES

       The  Company's  research  laboratories,   manufacturing  operations,  and
administrative  offices are located in Seattle,  Washington.  The Company leases
approximately  32,000  square  feet of space in Seattle  under a lease that will
expire in 2005. The Seattle facility has adequate capacity for the Company's 
present needs.


ITEM 3.     LEGAL PROCEEDINGS

       Information   regarding  Legal  Proceedings  is  incorporated  herein  by
reference to note 11 in the "Notes to Financial  Statements"  on pages 32 and 33
of the Annual Report to Shareholders.


ITEM 4.    SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

       No matters  were  submitted to a vote of  shareholders  during the fourth
quarter ended December 31, 1997.


<PAGE>





                                     PART II

ITEM 5.    MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED SHAREHOLDER MATTERS

       Information regarding the Common Stock trading activity for 1997 and 1996
is  incorporated  herein by reference to the  "Shareholder  Information  - Price
Range of Common Stock" on page 36 of the Annual Report to Shareholders, which is
included as Exhibit 13.0 to this Annual Report on Form 10-K.

       As of March 17,  1998,  there  were  12,696,250  shares  of Common  Stock
outstanding  held of record  by  approximately  154  shareholders.  The  Company
believes there are approximately 3,600 additional owners of Common Stock who own
shares held in street name.

       The Company has never paid cash dividends and has no present intention of
paying dividends in the foreseeable future.

       TRANSFER  AGENT AND REGISTRAR - The transfer  agent and registrar for the
Common Stock is ChaseMellon Shareholder Services, L.L.C., Seattle, Washington.


ITEM 6.    SELECTED FINANCIAL DATA

       The information required by this item is incorporated herein by reference
to "Selected  Financial  Data" on page 20 of the Annual Report to  Shareholders,
which is included as Exhibit 13.0 to this Annual Report on Form 10-K.


ITEM 7.    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
           RESULTS OF OPERATIONS

       The information required by this item is incorporated herein by reference
to pages  21-23 of the  Annual  Report to  Shareholders,  which is  included  as
Exhibit 13.0 to this Annual Report on Form 10-K.

ITEM 7A.   QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

       Not Applicable


ITEM 8.    FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

       The information required by this item is incorporated herein by reference
to the Financial Statements and "Notes to Financial  Statements" on pages 24-33,
and "Report of Independent Public  Accountants" on page 34, of the Annual Report
to Shareholders, which is included as Exhibit 13.0 to this Annual Report on Form
10-K.


ITEM 9.    CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
           FINANCIAL DISCLOSURE

       None.




<PAGE>



                                    PART III

ITEM 10.   DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

       a.  Directors

       The information  contained in the section entitled "Election of Directors
and  Director  Information"  of the Proxy  Statement is  incorporated  herein by
reference in response to this item.

       b.  Executive Officers of the Registrant

       Information  required by this item is  contained in Part I of this Annual
Report  on  Form  10-K  in  the  section  entitled  "Executive  Officers  of the
Registrant."

       c.  Compliance With Section 16(a)

       Information  contained in the section  entitled  "Compliance with Section
16(a) of the  Exchange  Act" of the Proxy  Statement is  incorporated  herein by
reference in response to this item.


ITEM 11.   EXECUTIVE COMPENSATION

       The   information   contained   in  the   section   entitled   "Executive
Compensation"  of the Proxy  Statement  is  incorporated  herein by reference in
response to this item.


ITEM 12.   SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

       The information  contained in the section entitled "Security Ownership of
Certain Beneficial Owners and Management" of the Proxy Statement is incorporated
herein by reference in response to this item.


ITEM 13.   CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

       The information contained in the section entitled "Compensation Committee
Interlocks and Insider  Participation"  of the Proxy  Statement is  incorporated
herein by reference in response to this item.





<PAGE>



                                     PART IV

ITEM 14.   EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

       (A) FINANCIAL STATEMENTS, FINANCIAL STATEMENT SCHEDULES AND EXHIBITS

       The  information  contained  in the  Financial  Statements  and "Notes to
Financial  Statements"  are  located  on pages  24-33 of the  Annual  Report  to
Shareholders and are listed below.  This information is included as Exhibit 13.0
to this Annual Report on Form 10-K.

                                                         Page within
       FINANCIAL STATEMENTS                             ANNUAL REPORT
       --------------------                             -------------
       Balance Sheets                                        24
       Statements of Operations                              25
       Statements of Cash Flows                              26
       Statements of Shareholders' Equity                    27
       Notes to Financial Statements                         28
       Report of Independent Public Accountants              34

       (B) REPORTS ON FORM 8-K

       None












<PAGE>


       (C)  EXHIBIT INDEX (13)

                                  EXHIBIT INDEX

       EXHIBIT NUMBER      DESCRIPTION
       --------------      -----------
       (8)   3.1           Articles of Incorporation, as amended, 
                           dated January 1997

       (1)   3.2           Bylaws, as amended

       (1)   4.1           Specimen Common Stock Certificate

       (1) 10.1A           Amended and Restated Stock Option Plan
       (1) 10.1B           Form of Employee Stock Option Agreement
       (1) 10.1C           Form of Director's Stock Option Agreement

       (9)  10.2           Amended and Restated Directors' Nonqualified Stock
                           Option Plan dated July 16, 1997

       (9)  10.3           Amended and Restated 1994 Stock Option Plan

                           Agreements with Hologic, Inc.
       (3)(12)10.4A         Co-Promotion and Sales Representation Agreement 
                              dated January 14, 1997
       (3)(12)10.4B         Joint Development, License and Supply Agreement 
                              dated January 14, 1997

       (1)  10.5           Form of  Indemnification Agreement with officers 
                           and directors

                           Agreement with Thomas A. Bologna
            10.7              Executive Employment Agreement dated July 16, 1997

                           Agreements with Mochida Pharmaceutical Co., Ltd.
       (1)10.12A              Research and Development Agreement dated August 
                              1992
       (1)10.12B              Osteomark License Agreement Dated August 1992

       (3)10.12D              Second Amendment to Osteomark License Agreement 
                              dated December 24, 1997

                           Agreements with the Washington Research Foundation
       (1)10.13A              Restated Exclusive License Agreement effective 
                              June 19, 1992 (Urinary Assay for Measuring Bone 
                              Resorption)
       (1)10.13B              Amendment to Restated Exclusive License Agreement
                              effective January 1, 1993
       (1)10.13C              Second Amendment effective June 2, 1994
       (1) 10.14              Exclusive License Agreement dated February 10, 
                              1994 (O-CSF)

                           Agreements with the University of Washington
       (3)(12)10.15A          Research Agreement dated July 1, 1996 (Molecular 
                              Markers of Connective Tissue Degradation)
       (3)(12)10.15B          Research Agreement dated October 1, 1996 (Role 
                              of O-CSF in Osteoclast Regulation)

       (1)10.16A           Know-How Transfer and Consulting Agreement dated 
                           September 18, 1989 with David R. Eyre, Ph.D.
       (1)10.16B           Extension and Amendment dated May 1, 1992

       (1) 10.19           Osteomark EIA Exclusive Distribution License 
                           Agreement dated March 28, 1994 with Technogenetics 
                           S.R.L. (division of Recordati Pharmaceutical)

       (1) 10.20           Osteomark EIA Distribution License Agreement dated 
                           July 12, 1994 with BRAHMS Diagnostic (formerly 
                           Henning Berlin GmbH)



<PAGE>



       EXHIBIT NUMBER      DESCRIPTION
       --------------      -----------   
       (1)10.23            Osteomark Agreement dated February 12, 1993, as 
                           amended May 10, 1994, with Nichols Institute 
                           Reference Laboratory

       (1)10.25            License Agreement dated July 8, 1994  with 
                           Endrocrine Sciences

       (1)10.26            License Agreement dated August 1994 with 
                           Pacific Biometrics, Inc.

                           Lease Agreements
       (4)10.27A              Lease Agreement dated October 2, 1995, with David
                              A. Sabey and Sandra L. Sabey
       (8)10.27B              First Amendment of Lease dated October 15, 1996, 
                              with the City of Seattle,  successor-in-interest 
                              to David A. Sabey and Sandra L. Sabey

                           Agreements with Johnson & Johnson Clinical 
                           Diagnostics, Inc.
       (5)10.28A              Distribution Agreement dated June 7, 1995
       (5)10.28B              Research, Development, License and Supply 
                              Agreement dated June 7, 1995

       (4)10.29            Clinical Laboratory Services License and Supply 
                           Agreement dated October 25, 1995, with SmithKline 
                           Beecham Clinical Laboratories, Inc.
       
          10.30            Promotion Agreement dated September 30, 1997 with 
                           Wyeth-Ayerst Laboratories
  
       (6)10.31            Agreement with Laboratory Corporation of Americao 
                           Holdings (LabCorp), dated January 11, 1996

       (7)10.32            Joint Development, License and Co-Marketing 
                           Agreement dated April 10, 1997 with Metrika, Inc.

       (10)10.33           Form of CS First Boston Corporation Warrant

       (11)10.34           Form of Invemed Associates, Inc. Warrant

       (2)10.35            Shareholder Rights Agreement dated January 21, 1997

           13.0           Selected Financial Data,  Management's  Discussion and
                          Analysis  of  Financial   Condition   and  Results  of
                          Operations,  Financial  Statements  and  Notes  to the
                          Financial  Statements from the Company's Annual Report
                          to Shareholders for the year ended December 31, 1997

           23.1           Consent of Arthur Andersen LLP

           27.1           Financial Data Schedule

- -----------------------------

(1)    Incorporated herein by reference from Item 16(a) of Registrant's 
Form S-1 Registration Statement as declared effective January 24, 1995 
(No. 33-86118).
(2)    Incorporated herein by reference to exhibit number 4.5 filed with Form 
8-A with the Commission in January 1997.
(3)    Confidential  treatment  requested.  Exhibit  omits  information  that 
has  been  filed  separately  with  the Commission.
(4)    Incorporated  herein by reference to exhibit of the same number  filed 
with Form 10-K with the  Commission  for the year ended December 31, 1995.
(5)    Incorporated  herein by reference to exhibit of the same number  filed 
with Form 10-Q with the  Commission  for the quarter ended June 30, 1995.
(6)    Incorporated  herein by reference to exhibit of the same number  filed 
with Form 10-Q with the  Commission  for the quarter ended March 31, 1996.
(7)    Incorporated  herein by reference to exhibit of the same number  filed 
with Form 10-Q with the  Commission  for the quarter ended September 30, 1997.
(8)      Incorporated  herein by  reference  to exhibit of the same number filed
 with Form 10-K with the  Commission  for the year  ended  December  31, 1996.
(9)    Incorporated  herein by  reference  to exhibit of the same number  filed
with Form S-8 with the  Commission  on January 13, 1998.
(10)     Incorporated  herein by reference to exhibit number 1.1A filed with the
Registrant's  Form S-1  Registration  Statement  as declared  effective 
January 24, 1995 (No. 33-86118).
(11)     Incorporated  herein by reference to exhibit number 1.1B filed with the
Registrant's  Form S-1  Registration  Statement  as declared  effective
January 24, 1995 (No. 33-86118).
(12)     Incorporated  herein by  reference to exhibits of the same number filed
with Form 10-K with the  Commission  for the year  ended  December  31, 1996, 
and as amended with Form 10-K/A on October 17, 1997.
(13) Copies of exhibits  may be  obtained  at  prescribed  rates from the Public
Reference Section of the Commission at 450 5th Street NW, Room 1024, Washington,
D.C. 20549, or through the Commission's  Edgar system located on the internet at
www.sec.gov.



<PAGE>




                                   SIGNATURES


    Pursuant  to the  requirements  of  Section  13 or 15(d)  of 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 on March 27, 1998.

                                               OSTEX INTERNATIONAL, INC.


                                               By  /S/ THOMAS A BOLOGNA
                                               ------------------------
                                                   Thomas A. Bologna
                                                  President and Chief
                                            Executive Officer and Director



    Pursuant to the  requirements  of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
Registrant and in the capacities and on the dates indicated.


      SIGNATURE                  CAPACITIES                   DATE
      ---------                  ----------                   ----
                               
/S/THOMAS A. BOLOGNA            President and
- ------------------------    Chief Executive Officer           March 27, 1998
 Thomas A. Bologna       (principal executive officer)


/S/ ROBERT M. LITTAUER    Senior Vice President, Finance
- ------------------------ and Administration and Secretary     March 27, 1998
  Robert M. Littauer     (principal financial and principal 
                               accounting officer)

                           
   /S/ THOMAS J. CABLE      Chairman of the Board
- ------------------------        of Directors                  March  27, 1998
   Thomas J. Cable             
                                  
 /S/ ELISABETH L. EVANS                           
- ------------------------                                      March 27, 1998
  Elisabeth L. Evans              Director


   /S/ DAVID R. EYRE              Director                    March 27, 1998
- ------------------------
     David R. Eyre

 /S/ FREDRIC J. FELDMAN
- ------------------------          Director                    March 27, 1998
   Fredric J. Feldman

  /S/ GREGORY D. PHELPS
- ------------------------          Director                    March 27, 1998
   Gregory D. Phelps


- ------------------------          Director                    March 27, 1998
    Gilbert S. Omenn

   /S/ JOHN H. TRIMMER            Director                    March 27, 1998
- ------------------------
     John H. Trimmer




Exhibit 10.7







                         EXECUTIVE EMPLOYMENT AGREEMENT



                            OSTEX INTERNATIONAL, INC.



                                THOMAS A. BOLOGNA



















                            Dated as of July 16, 1997



<PAGE>




                         EXECUTIVE EMPLOYMENT AGREEMENT


         This Executive Employment Agreement (this "Agreement") between Ostex 
International, Inc. (the "Company"), a Washington corporation and Thomas 
A. Bologna ("Executive") is dated and entered into as of July 16, 1997.

         In consideration of the mutual covenants and promises contained herein,
the Company and the Executive agree as follows:

         1.       Employment

         The Company will employ the  Executive  and the  Executive  will accept
employment  by the Company as its President and Chief  Executive  Officer,  with
duties and  responsibilities  customarily  associated  with such  position.  The
Executive  will perform such duties as may be assigned  from time to time by the
Board of Directors  of the Company  which relate to the business of the Company,
its  subsidiaries  or  any  business  ventures  in  which  the  Company  or  its
subsidiaries may participate.

         2.       Attention and Effort

         The Executive will devote his full business time,  attention and effort
to the  Company's  business  and will use his skills and render  services to the
best of his  ability  to serve the  interests  of the  Company.  Notwithstanding
anything herein to the contrary, the parties agree that Executive may serve as a
member of the board of Directors  of other  corporations  or entities  (provided
that such  corporations  or entities do not compete with the Company) and engage
in consulting and other activities  related to such  directorships and that such
service shall not constitute a violation of Executive's  duties and  obligations
to  the  Company;  provided,   however,  that  such  directorships  and  related
consulting  and  other  activities  (i)  shall be  limited  to those  which  the
Executive  currently  performs  pursuant to existing  agreements  that have been
disclosed to the Company and (ii) shall not materially detract from or interfere
with the Executive's obligations under this Section 2.

         3.       Term

         Unless  otherwise  terminated as provided in paragraphs 6 and 7 of this
Agreement,  the  Executive's  term of  employment  under  this  Agreement  shall
commence  on the date  hereof  and  shall  expire  on July 15,  2001;  provided,
however,  that this  Agreement  shall be  automatically  renewed  thereafter for
additional  terms of one year each unless  either the  Company or the  Executive
gives the other written  notice of termination at least 30 days prior to the end
of the then current term.


<PAGE>

         4.       Compensation

                  4.1      Base Salary

         The Executive's  compensation shall consist, in part, of an annual base
salary of $275,000 before all customary payroll  deductions (the "Base Salary").
The Base Salary shall be paid in  substantially  equal  installments at the same
intervals  as other  officers of the Company are paid.  The Base Salary shall be
increased  effective on the first anniversary of this Agreement by not less than
10% of the Base Salary. Thereafter, further increases to the Base Salary will be
reviewed annually by the Board of Directors and any adjustments shall be made at
the sole  discretion  of the Board of  Directors.  The Base Salary  shall not be
reduced without Executive's express consent.

                  4.2      Bonus

         For services  rendered for the period  through  December 31, 1997,  the
Executive  shall be paid a bonus of $50,000,  of which  $25,000 shall be paid on
the date of this Agreement and $25,000 shall be paid on January 10, 1998.

         5.       Benefits and Expenses

                  5.1      Expenses

         The Company shall  promptly  reimburse the Executive for all reasonable
and necessary business expenses incurred and advanced by him in carrying out his
duties under this  Agreement.  The  Executive  shall present to the Company from
time  to time an  itemized  account  of  such  expenses  in such  form as may be
required by the Company.

                  5.2      Benefits

         During  the  term of  employment  hereunder,  the  Executive  shall  be
entitled to participate fully in any and all benefit plans,  programs,  policies
and any and all  fringe  benefits  which  may be made  available  to the  senior
executives  of the  Company  generally,  including  but not  limited to medical,
dental,  disability,  pension and retirement benefits,  life insurance and other
death benefits.

                  5.3      Travel and Relocation Expenses

         During the term of Executive's employment,  the Company shall reimburse
the Executive for or pay directly the  reasonable  expense of (i) round trip air
travel  from San Diego to  Seattle  once per  week,  (ii)  leasing  a  furnished
apartment in Seattle (including utilities, telephone and similar expenses), such
leases to be subject to the Company's  approval (iii) limited  moving  expenses,
and (iv)  temporary  living  accommodations  in Seattle  until an  apartment  is
rented.  The Company and the Executive shall agree on a budget for such expenses

<PAGE>

as soon as  practicable  after the date of this Agreement and shall initial such
final budget to  acknowledge  the agreed levels of expenses.  To the extent that
such  reimbursement  or direct payment shall be treated as taxable  income,  the
Executive  shall receive a "gross up" bonus to compensate  the Executive for any
and all income taxes that the  Executive  may be required to pay with respect to
such  reimbursement  and gross up bonus  (whenever such taxes may be assessed or
paid). The Executive shall report all such  reimbursement and "gross up" bonuses
as ordinary  income for income tax purposes.  Upon  termination  of  Executive's
employment,  if Executive so requests, the Company shall reimburse the Executive
for the  reasonable  expense of  relocating  to San Diego (or  another  location
designated  by  Executive  within the United  States) and shall assume any lease
which Executive may have entered into in Seattle.

                  5.4      Stock Options

         Simultaneously  herewith,  the Company has granted  options to purchase
700,000  shares of Common  Stock to the  Executive  under the  authority  of its
Amended  and  Restated  1994 Stock  Option  Plan and  pursuant  to the terms and
conditions of the Stock Option Agreement dated July 16, 1997 between the parties
(the "Stock Option Agreement"). Annually, the Board of Directors shall consider,
at its sole discretion,  granting additional stock options to the Executive. The
Company  represents  and warrants to the Executive  that all stock options (both
incentive stock options and nonqualified stock options) it has granted under the
1994 Stock  Option  Plan have  contained a provision  that vested  options  will
terminate  upon  the  expiration  of 90 days  from  the  date  of an  optionee's
termination of employment or contractual  relationship  with the Company for any
reason other than death or disability.

                  5.5      Insurance

         During the term of the Executive's employment,  the Company will obtain
term life insurance on the life of the Executive,  which  insurance will provide
for the payment of an amount equal to the Base Salary for one year (or an amount
equal to two  times  the Base  Salary  following  a Change  in  Control)  to the
Executive's  spouse in the event of the  Executive's  death;  provided  that the
Company may obtain such insurance for a larger amount,  with the balance payable
to the Company in the event of the Executive's death.


<PAGE>

         6.       Termination

         Employment  of  the  Executive   pursuant  to  this  Agreement  may  be
terminated as follows, but in any case, the provisions of Sections 8 and 9 shall
survive the termination of the Executive's employment:

                  6.1      By the Company

         With or without  Cause (as defined  below),  the Board of Directors may
terminate  the  employment  of the  Executive  at any time  during the Term upon
giving Notice of Termination (as defined below).

                  6.2      By the Executive

         The Executive  may terminate his  employment at any time for any reason
upon giving Notice of Termination.

                  6.3      Automatic Termination

         Employment shall terminate automatically upon death or total disability
of the  Executive.  The term "total  disability"  as used herein,  shall mean an
inability  to  perform  the duties set forth in  paragraph  1 of this  Agreement
because of  illness or  physical  or mental  disability  for a period or periods
aggregating  120 calendar days in any 12-month  period,  unless the Executive is
granted a leave of absence by the Board of Directors  of the Company.  Executive
and the Company hereby  acknowledge that the Executive's  ability to perform the
duties  specified  in  paragraph 1 of this  Agreement  is of the essence of this
Agreement.  Termination  hereunder  shall be deemed to be effective  immediately
upon the  Executive's  death or 30 days following a Notice of Termination  based
upon a determination by the Board of Directors of the Company of the Executive's
total disability, as defined herein.

                  6.4      Notice

         The  term  "Notice  of  Termination"   shall  mean  written  notice  of
termination of the  Executive's  employment.  The Executive's  employment  shall
terminate  effective  upon  receipt  of the  Notice of  Termination  or the date
specified in the Notice of  Termination,  whichever is later,  provided that the
Executive shall be entitled to termination payments in accordance with paragraph
7 of this Agreement.


<PAGE>

                  6.5      Cause

         Wherever  reference is made in this Agreement to termination being with
or without Cause,  "Cause" means cause given by the Executive to the Company and
is limited to the following:

                   (i) The  willful  and  material  breach of any  provision  of
         Sections 1 or 2  (including  but not  limited to the  refusal to follow
         reasonable and lawful directives of the Board of Directors) or Sections
         8 or 9;

                  (ii)     Conviction of a felony or of a crime involving moral
           turpitude;

                 (iii)     Continuing misuse of alcohol or controlled 
          substances; or

                  (iv)  The  willful  misconduct  or  gross  negligence  of  the
         Executive that results in a material adverse effect on the Company:

provided, however, that to the extent that a breach of Sections 6.5(i), (iii) or
(iv) is curable,  the Board of Directors will give the Executive  written notice
of such  breach  and the  Executive  will have 30 days from the  receipt of such
notice to cure such breach.

         7.       Termination Payments

         In the event of termination  of the  employment of the  Executive,  all
compensation  and benefits set forth in this Agreement shall terminate except as
specifically provided in this paragraph 7:

                  7.1      Termination by the Company

         If the Board of Directors terminates the Executive's employment without
Cause,  the  Executive  shall be  entitled to receive (i) any unpaid Base Salary
which has accrued for services  already  performed as of the date termination of
the Executive's employment becomes effective, (ii) the then existing Base Salary
the Executive would have received if his employment had continued for 12 months,
payable as provided in subparagraph 4.1 of this Agreement,  (iii) any bonus that
has been earned but not paid, and (iv) continuation of benefits for himself, his
spouse and his dependents (paid for by the Company) set forth in Section 5.2 for
a period of 12 months following such termination. If the Executive is terminated
by the Board of  Directors  for Cause,  the  Executive  shall not be entitled to
receive the  benefits set forth in clauses  (ii) and (iv).  If such  termination
occurs  without  Cause in connection  with or at any time  following a Change in
Control (as defined in the  Company's  Amended and  Restated  1994 Stock  Option
Plan), the Executive shall be entitled to a lump sum payment equal to two years'
Base Salary,  plus a bonus of 30% of such amount,  and  continuation of benefits
(paid for by the  Company)  set forth in  Section  5.2 for a period of 24 months
following such termination.


<PAGE>

                  7.2      Termination by the Executive

         If the Executive voluntarily  terminates his employment,  the Executive
shall not be  entitled  to receive  any  payments  hereunder  other than (i) any
unpaid Base Salary  which has accrued for services  already  performed as of the
date termination of the Executive's  employment  becomes  effective and (ii) any
unpaid bonus which has been earned but not yet paid.

                  7.3      Termination Because of Death or Total Disability

         In the event of a termination of the Executive's  employment because of
his death or total  disability,  the  Executive or his  personal  representative
shall not be  entitled  to receive  any  payments  hereunder  other than (i) any
unpaid Base Salary  which has accrued for services  already  performed as of the
date termination of the Executive's employment becomes effective, (ii) any bonus
which has been  earned  but not paid and (iii) a  continuation  of  medical  and
dental  benefits for  himself,  his spouse and his  dependents  (paid for by the
Company) for a period of eighteen months following such termination.

         8.       Nondisclosure

         As a condition of his employment hereunder,  the Executive has executed
and delivered to the Company Employee  Confidentiality  and Invention  Agreement
(the  "Nondisclosure  Agreement")  in the form attached  hereto as Exhibit A and
incorporated  herein  by  reference  as if  set  forth  in  full  herein,  which
Nondisclosure  Agreement  shall  survive  the  termination  of  the  Executive's
employment.

         9.       Noncompetition and Nonsolicitation

                  9.1      Applicability

         This  Section  9  shall  survive  the  termination  of the  Executive's
employment with the Company or the expiration of the term of this Agreement.

                  9.2      Scope of Competition

         The Executive agrees that he will not,  directly or indirectly,  during
his  employment  and for a period  of two  years  after  the  date on which  his
employment with the Company  terminates,  be employed by, own, manage,  operate,
join, control or participate in the ownership,  management, operation or control
of or be  connected  with,  in any manner,  any person or entity  engaged in any
business activity anywhere in the world (including without limitation  research,
development,  manufacturing,  selling, leasing, licensing or providing services)

<PAGE>

which  is  competitive  with any  products  or  services  that  the  Company  is
developing or exploiting  during the  Executive's  employment  with the Company,
unless  released  from such  obligation  in  writing by the  Company's  Board of
Directors.  The Executive  shall be deemed to be connected with such business if
such business is carried on by a  partnership,  corporation  or  association  of
which he is an employee,  member,  consultant or agent; provided,  however, that
nothing  herein shall  prevent the  purchase or  ownership  by the  Executive of
shares which constitute less than 2% of the outstanding  equity  securities of a
publicly or privately held corporation.

                  9.3      Scope of Nonsolicitation

         The  Executive  shall not,  in  addition,  directly or  indirectly  (i)
solicit,  or entice  any  employee  or  consultant  of the  Company to cease his
relationship  with the Company or (ii) solicit,  entice or in any way divert any
customer or supplier of the Company from doing  business with the Company.  This
Section 9.3 shall apply during the time period and  geographical  area described
in Section 9.2 hereof.

                  9.4      Equitable Relief

         The Executive  acknowledges  that the  provisions of this Section 9 are
essential to the Company,  that the Company would not enter into this  Agreement
if it did not  include  covenants  not to compete or  solicit  and that  damages
sustained  by the  Company as a result of a breach of such  covenants  cannot be
adequately  remedied  by damages,  and the  Executive  agrees that the  Company,
notwithstanding any other provision of this Agreement,  in addition to any other
remedy  it may  have  under  this  Agreement  or at law,  shall be  entitled  to
injunctive  and other  equitable  relief to prevent or curtail any breach of any
provision of this Agreement,  including  without  limitation this Section 9. The
Executive  acknowledges  that the covenants in this Agreement are reasonable and
that  compliance  with such  covenants  will not prevent him from  pursuing  his
livelihood.

                  9.5      Effect of Violation

         The Executive and the Company agree that additional  consideration  has
been   given  for  the   Executive   entering   into  the   noncompetition   and
nonsolicitation  provisions of this  Agreement and the  Nondisclosure  Agreement
described  in Section  10,  such  additional  consideration  including,  without
limitation certain provisions for termination payments pursuant to Section 7 and
other payments  pursuant to Section 8 of this Agreement.  Material  violation by
the  Executive of such  noncompetition  and  nonsolicitation  provisions  or the
Nondisclosure  Agreement shall relieve the Company of any obligation it may have
to make such  termination  payments  under  Section 7, but shall not relieve the
Executive of his obligation hereunder not to compete or solicit.


<PAGE>

                  9.6      Definition of the Company

         For  purposes  of  Sections  9.2 and 9.3 hereof,  "the  Company"  shall
include all subsidiaries of the Company,  the Company's  parent  corporation and
any  business  ventures in which the  Company,  its  subsidiaries  or its parent
corporation may participate.

         10.      Form of Notice

         Every notice  required by the terms of this Agreement shall be given in
writing by serving the same upon the party to whom it was addressed  personally,
by courier,  by facsimile  transmission  (with hard copy  delivered by overnight
courier) or by registered or certified mail,  return receipt  requested,  at the
address set forth below or at such other  address as may hereafter be designated
by notice given in compliance with the terms hereof:

         If to the Executive: Thomas A. Bologna
                              c/o Ostex International, Inc.
                              2203 Airport Way South, Suite 400
                              Seattle, Washington 98134


         If to the Company:   Ostex International, Inc.
                              2203 Airport Way South, Suite 400
                              Seattle, Washington 98134
                              Attention:  Chief Financial Officer

         Copy to:             James R. Lisbakken
                              Perkins Coie
                              1201 Third Avenue, 40th Floor
                              Seattle, Washington 98101

or such other address as shall be provided in accordance  with the terms hereof.
Notice shall be effective upon personal delivery,  delivery by courier,  receipt
of facsimile transmission or three days after mailing.


<PAGE>

         11.      Successors and Assigns

         For  purposes  of this  Agreement,  "Company  Successor"  means (a) any
corporation resulting from any merger,  consolidation or other reorganization to
which the Company is a party or (b) any corporation, partnership, association or
other person or entity to which the Company may  transfer  all or  substantially
all of the assets and business.  The Executive agrees that this Agreement may be
transferred  or assigned by the  Company to the Company  Successor.  Any Company
Successor shall succeed to the rights and  obligations of the Company  hereunder
and shall be bound by the terms of this Agreement.  If all or substantially  all
of the  outstanding  voting  stock of the  Company  is  transferred  to  another
corporation, partnership, association or other person or entity, the Company, at
the request of the Executive,  will reaffirm in writing it's  obligations  under
this Agreement.  This Agreement is not assignable by the Executive.  The Company
agrees  that it will  require  any  Company  Successor  (as a  condition  to any
transaction  described in this Section) to expressly assume and agree to perform
this Agreement,  including (without limitation) payment of the amounts set forth
in Section 7 above.

         12.      Waiver

         No  waiver of any of the  provisions  hereof  shall be valid  unless in
writing,  signed by the party  against whom such claim or waiver is sought to be
enforced,  nor shall  failure  to  enforce  any  right  hereunder  constitute  a
continuing waiver of the same or a waiver of any other right hereunder.

         13.      Amendments in Writing

         No amendment,  modification,  waiver,  termination  or discharge of any
provision of this  Agreement,  nor consent to any departure  therefrom by either
party  hereto,  shall in any  event be  effective  unless  the same  shall be in
writing,  specifically  identifying this Agreement and the provision intended to
be amended, modified, waived, terminated or discharged and signed by the Company
and the Executive, and each such amendment, modification, waiver, termination or
discharge shall be effective only in the specific  instance and for the specific
purpose  for which  given.  No  provision  of this  Agreement  shall be  varied,
contradicted  or  explained  by  any  oral  agreement,   course  of  dealing  or
performance  or any other  matter not set forth in an  agreement  in writing and
signed by the Company and the Executive.

         14.      Applicable Law

         This Agreement shall be governed by the  substantive  laws of the state
of Washington, without regard to its conflicts of laws provisions.


<PAGE>

         15.      Severability

         All   provisions   of   this   Agreement   are   severable,   and   the
unenforceability  or invalidity of any single  provision hereof shall not affect
the remaining provisions.

         16.      Headings

         All  headings  or  titles  in this  Agreement  are for the  purpose  of
reference  only  and  shall  not  in  any  way  affect  the   interpretation  or
construction of this Agreement.

         17.      Attorneys' Fees

         The Company will reimburse the Executive for reasonable  attorneys fees
in connection with the preparation and review of this Agreement, up to a maximum
or $3,000.

         18.      Entire Agreement

         This  Agreement,  the  Stock  Option  Agreement  and the  Nondisclosure
Agreement constitute the full and entire understanding and agreement between the
parties  with  respect to the  subject  matter  hereof and  supersede  all prior
agreements with respect to the subject matter hereof.



         IN WITNESS  WHEREOF,  the parties  have  executed and entered into this
Agreement on the date set forth above.

                                                     EXECUTIVE:


                                                     /S/ THOMAS A. BOLOGNA
                                                     -----------------------
                                                      Thomas A. Bologna



                                                     COMPANY:

                                                     OSTEX INTERNATIONAL, INC.


                                                    By: /S/ THOMAS J. CABLE
                                                      ----------------------
                                                      Its Chairman of the
                                                      Board of Directors


Exhibit 10.12D

NOTE: CONFIDENTIAL TREATMENT REQUESTED. EXHIBIT OMITS INFORMATION THAT HAS
      BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION.


                                SECOND AMENDMENT
                                       TO
                OSTEOMARK-registered trademark- LICENSE AGREEMENT


         This  Second  Amendment  to  Osteomark-registered   trademark-  License
Agreement (this "Second Amendment") is effective as of December 24, 1997, by and
between Ostex International, Inc. ("Ostex") and Mochida Pharmaceutical Co., Ltd.
("Mochida").

                                    RECITALS

         A. WHEREAS, Ostex and Mochida are parties to that certain Osteomark-TM-
License  Agreement,  as  amended,  dated as of August  21,  1992  (the  "License
Agreement"),   pursuant  to  which  Ostex   granted  a  license  to  Mochida  to
commercialize the urine-based assay to measure bone resorption in Japan.

         B.       WHEREAS, Section 5.2 of the License Agreement established 
"a flexible pricing formula to enable both Ostex and Mochida to remain 
profitable while selling Finished Product in the Territory."

         C. WHEREAS,  circumstances have changed since the License Agreement was
entered  into  in  1992,  to  such  extent  that:   first,   Mochida's  cost  of
manufacturing  Osteomark  microtiter kits is now  established,  and such cost is
significantly  higher  than  was  anticipated  in  1992;  second,  the  Japanese
government  control  of the  national  health  care  system has  shifted  toward
deregulation, thereby disrupting the reimbursement pricing system upon which the
original  pricing  formula  was  based;  and  third,   Mochida  requires  stable
circumstances  during the initial stage of the Osteomark product launch to avoid
cost, supply, packaging and quality control problems.

         NOW, THEREFORE,  for good and valuable  consideration,  the receipt and
sufficiency of which are hereby acknowledged, the parties agree that the License
Agreement is amended as follows:

                                    AGREEMENT

         1.       Exchange Rate.  Section 4.8 of the License Agreement is 
hereby amended to read in its entirety as follows:

                  4.8 Exchange  Rate.  All monies due Ostex under this Agreement
                      shall be paid in United States Dollars.  The parties agree
                      that the prices stated in Yen in this  Agreement are based
                      on an exchange rate of  (Y)115:$1.  The parties agree that
                      they will share  equally the risk of  fluctuations  in the
                      exchange  rate.  To this end,  the  prices  stated in this
                      Agreement  will be paid in United  States  Dollars  at the
                      exchange rate  determined in accordance with the following
                      formula:

                                            AER  =  115  +  (ER - 115)
                                                             --------
                                                                2

                      where:

                      AER  =  the Agreed Exchange Rate for converting the 
                               stated prices to United States Dollars; and
                      ER   =  the  Exchange  Rate  quoted by the Wall  Street
                               Journal on the date on which Ostex  prepares  the
                               first  draft  of the  relevant  invoice  for each
                               shipment (a copy of the relevant page of the Wall
                               Street  Journal shall be sent to Mochida with the
                               invoice).


<PAGE>

                      Notwithstanding the foregoing,  the transfer price for the
                      shipment of Critical  Reagents  to Mochida  under  Mochida
                      Order No.  MS-970027  shall be  converted  and paid at the
                      spot  exchange  rate quoted by the Wall Street  Journal on
                      December 3, 1997.

         2.       Manufacture and Pricing of Kit Components.  Section 5 of 
the License Agreement is hereby replaced in its entirety by the following 
new Section 5:

                  5.       Supply of Critical Reagents and Kit Components.

                           5.1 Supply of Critical Reagents.  Ostex shall provide
         to  Mochida a supply of the  Critical  Reagents  to be  assembled  into
         Finished Products and to be marketed, promoted, sold and distributed by
         Mochida in accordance with the terms of this Agreement and the relevant
         quality criteria jointly established by Ostex and Mochida (the "Quality
         Criteria").  Such Critical  Reagents shall be manufactured by Ostex, or
         by  one  or  more   third-party   licensees   of   Ostex   at   Ostex's
         responsibility, and shall meet the Quality Criteria.

                           5.2 Manufacture and Supply of Kit Components. Mochida
         shall transfer the right and  responsibility for the manufacture of all
         components of Finished  Products,  other than Finished Product labeling
         and packaging materials, (the "Kit Components") to Ostex by the time to
         be agreed upon between the parties but no later than December 31, 2000,
         on the  terms  and  conditions  set  forth  below.  Mochida  will  file
         applications  with and pursue the approval of the  applicable  Japanese
         governmental  authorities  to obtain  registrations  to import  all Kit
         Components by such date.  Such Kit Components  shall be manufactured by
         Ostex, or by one or more third-party licensees of Ostex, and shall meet
         the Quality  Criteria to be agreed  between  the parties  covering  Kit
         Components.  If or  when  Mochida  requests  Ostex  to  label  the  Kit
         Components, Ostex shall accept such request by Mochida at no additional
         cost,  fee or expense in the following  way: Ostex shall supply Mochida
         with  specifications for the preparation of labels which can be applied
         using Ostex  machinery,  and Mochida  shall supply Ostex with labels in
         Japanese  to be  applied  to such Kit  Components.  In the  event  that
         Mochida finds it difficult to obtain blank label stock meeting  Ostex's
         specifications,  then at Mochida's  option,  Ostex  through its vendor,
         will  supply such stock to  Mochida,  or will print such  labels  using
         Mochida's artwork, at Mochida's cost.

                           5.3      Quantity of Critical Reagents and Kit 
                                    Components.

                                    (a)     Mochida shall provide to Ostex 
         at least sixty (60) days
         prior  to the  commencement  of  each  calendar  quarter,  a  quarterly
         forecast of commercial demand for Critical Reagents (or, if applicable,
         Kit  Components)  to be imported by Mochida into the  Territory  during
         such  quarter.  Mochida shall deliver to Ostex at least sixty (60) days
         prior to the expected  shipment  date a purchase  order for a specified
         quantity of Critical Reagents (or, if applicable, Kit Components).

                                    (b)     Ostex shall deliver to Mochida 
         shipments of Critical
         Reagents or Kit Components (once  responsibility for manufacturing such
         Kit Components has been transferred to Ostex) in quantities  reasonably
         necessary to satisfy the commercial demand for Finished Products within
         the Territory.  Ostex and Mochida shall, from time to time as necessary
         following the  commencement  of commercial  sales,  adjust the terms of
         quantity and  delivery to  correspond  to such  commercial  demand,  in
         accordance with the quarterly forecasts provided by Mochida pursuant to
         Section 5.3(a) above.


<PAGE>

                     NOTE: CONFIDENTIAL TREATMENT REQUESTED

                                    (c)     Notwithstanding the foregoing or 
         any other provision of
         this Agreement, it is understood between Ostex and Mochida that, in the
         event  formats  other  than  the  current  microtiter  format  for  the
         technology  are developed or utilized by the parties,  and the delivery
         of Critical  Reagents or Kit Components for such format pursuant to the
         transfer prices set forth in this Agreement would be less profitable to
         Ostex,  the  parties  agree that they will  renegotiate  such  transfer
         prices in good faith. In any event,  Ostex shall be under no obligation
         to supply  Critical  Reagents or Kit Components to Mochida for a format
         other  than the  current  microtiter  format  at a price  which is less
         profitable than the current pricing for the microtiter format.

                           5.4 Price for Critical  Reagents and Kit  Components.
         Mochida  shall  pay for  each  shipment  of  Critical  Reagents  or Kit
         Components,  within  sixty  (60) days of the date of  invoice  for such
         shipment, the amounts set forth below:

                                    (a)     For all Critical Reagents ordered
         by Mochida prior to
         July 6, 1999 (including  Mochida's Order No. MS-970027),  Mochida shall
         purchase  Critical  Reagents at a price of (Y)XXXXXXXX per kit, payable
         in United States Dollars at the exchange rate set forth in Section 4.8.
         For orders  received  by Ostex on or after July 6, 1999,  Mochida  will
         purchase  quantities of Critical  Reagents at a price of (Y)XXXXXXX per
         kit, payable in United States Dollars at the exchange rate set forth in
         Section 4.8. In the event that Kit Component  manufacturing rights have
         not been  transferred  to Ostex by December 31, 2000 the parties  shall
         renegotiate the price for Critical Reagents at that time, provided that
         nothing in this  section  shall  limit  Ostex's  ability to enforce the
         provisions of this Agreement  regarding such transfer of  manufacturing
         rights.

                                    (b)     On or after the transfer to Ostex 
         of responsibility for
         the manufacture of Kit Components,  as an alternative to the pricing of
         Critical Reagents set forth in Section 5.4(a) above,  Mochida shall pay
         to Ostex,  for all Kit Components  required for each Finished  Product,
         the price set forth in this  Section  5.4(b).  Such price  shall  equal
         (Y)XXXXXXX  per kit,  payable in United States  Dollars at the exchange
         rate set  forth in  Section  4.8,  subject,  in  addition  to any other
         adjustments  provided for herein,  to annual  adjustments  from January
         1998  proportionate  to one-half of the  increase in the U.S.  Consumer
         Price Index (All Urban Consumers) ("CPI"), which adjustment shall occur
         upon  publication  of such index on the  publication  date most closely
         following each anniversary after January 1998. Ostex shall send Mochida
         a copy of the publication of such index annually from January, 1998.

                                    (c)     In the event that the average 
         price at which Mochida
         sells  Finished  Product in any calendar year  increases  more than XX%
         over the average price at which Mochida sold  Finished  Product  during
         the preceding  year,  Mochida  shall so notify  Ostex,  and the parties
         shall renegotiate in good faith the prices set forth in Section 5.4 (a)
         and (b) above to allow for an equitable sharing of such increase.

                           5.5  Delivery.  Ostex shall  deliver each shipment of
         Critical Reagents and Kit Components F.A.S.  carrier (as defined in, or
         otherwise in accordance with  INCOTERMS,  in effect at the time of each
         shipment), in accordance with instructions issued in writing by Mochida
         with respect to each shipment.

                           5.6 Risk of Loss.  The risk of loss  with  regard  to
         each  shipment of Critical  Reagents and Kit  Components  shall pass to
         Mochida upon delivery thereof to the carrier in accordance with Section
         5.5 above.


<PAGE>

                           5.7 Acceptance. Ostex warrants that Critical Reagents
         and Kit Components  supplied by Ostex shall meet the Quality  Criteria.
         Mochida shall inspect  shipments of Critical Reagents within sixty (60)
         days after  receipt of  Critical  Reagents  and Kit  Components  within
         thirty  (30) days after  receipt of Kit  Components,  by Mochida at its
         factory  in  Japan,  and  shall  notify  Ostex of the  results  of such
         inspection  within  such  periods.  If  Mochida  notifies  Ostex of any
         defects in quality  within such periods,  Ostex shall  promptly  supply
         Mochida,  free of charge,  with Critical  Reagents or Kit Components in
         such amount as to replenish  or make good such  defects in quality.  In
         the event that there is a shortage in quantity,  Ostex will, at its own
         expense,  correct such shortage as soon as possible.  In no event shall
         this  Section  5.7 affect  the risk of loss  specified  in Section  5.6
         above.  For example,  without limiting the generality of the foregoing,
         in the event that a shipment of Critical  Reagents or Kit Components is
         damaged in shipment, Mochida shall bear the loss and damage, and at its
         discretion  shall obtain insurance money covering such loss and damages
         for its own  sake.  In this  case,  if  Mochida  places  with  Ostex an
         additional order to fill the  insufficiency of Critical Reagents or Kit
         Components  lost or damaged,  Ostex shall be responsible  for supplying
         Mochida with such  Critical  Reagents or Kit  Components as promptly as
         possible. Pricing for such an additional order for Critical Reagents or
         Kit  Components  shall be  governed by Schedule  5.7  attached  hereto,
         subject to adjustment from time to time by reasonable  agreement of the
         parties.  Both parties  shall review this Section 5.7 to determine  the
         practical  conditions for the inspection  period and acceptance  period
         regarding the shipment of Critical  Reagents and Kit Components  before
         first shipment of such materials.  Notwithstanding  the foregoing,  if,
         after  Critical  Reagents  or Kit  Components  have  been  accepted  by
         Mochida,  a defect is  discovered  in the Critical  Reagents or the Kit
         Components  which was not  reasonably  capable of  discovery by Mochida
         during the inspection period, Ostex agrees it will work with Mochida in
         good faith to resolve such defects in an equitable manner. Further, the
         parties  specifically agree that if or when such defects were caused in
         the process of the manufacture by Ostex,  Ostex shall replenish or make
         good such defects in the quality at its cost and responsibility.

                           5.8      [This Section Intentionally Deleted]

                  3.        Indemnification. Section 15 of the License 
                            Agreement is hereby amended to read in
                            its entirety as follows:

                  Mochida shall defend,  indemnify, save and hold harmless Ostex
                  and its directors,  officers,  employees,  and agents from all
                  losses,  claims,  suits,  damages,  costs,  fees and expenses,
                  including  without  limitation  attorneys'  fees  (hereinafter
                  collectively  referred to as the  "Loss"),  resulting  from or
                  arising out of the  importation  of  Critical  Reagents or the
                  manufacturing,  marketing,  sale, or  distribution of Finished
                  Product by Mochida,  including without limitation any damages,
                  losses or  liabilities  whatsoever  with  respect  to death or
                  injury to any person or damage to any  property.  Ostex  shall
                  promptly notify Mochida of any Loss for which  indemnification
                  is sought hereunder.

                  Further,  in the event that the  manufacture of Kit Components
                  is  transferred  to Ostex pursuant to Section 5.2, Ostex shall
                  defend,  indemnify,  save and hold  harmless  Mochida  and its
                  directors,  officers,  employees,  and agents from any and all
                  Loss resulting from or arising solely out of the manufacturing
                  process of Kit Components by Ostex or its licensees, including
                  without   limitation  any  damages,   losses,  or  liabilities
                  whatsoever  with  respect  to death or injury to any person or
                  damage to any property. Mochida shall promptly notify Ostex of
                  any Loss for which indemnification is sought hereunder.


<PAGE>

                  The  foregoing  indemnification  by Ostex shall apply  mutatis
                  mutandis as to any and all Loss incurred to Mochida  resulting
                  from or arising  from the  manufacturing  process of  Critical
                  Reagents by Ostex or its licensees.

                  The indemnification by Mochida provided herein shall not apply
                  if or when  such  Loss is based  on,  or  caused  by,  willful
                  misconduct or  negligence  of Ostex,  its licensees or vendors
                  (including their directors,  officers or employees).  Further,
                  the  indemnification  by Ostex provided herein shall not apply
                  if or when  such  Loss  is  based  on  willful  misconduct  or
                  negligence of Mochida, its directors, officer or employees.

         4. Full Force and Effect. This Second Amendment is made pursuant to the
License Agreement and shall constitute an integral part thereof. All capitalized
terms  that are used in this  Second  Amendment  and are not  otherwise  defined
herein are intended to have the  meanings  assigned to such terms in the License
Agreement.  Except as specifically amended in this Second Amendment, the License
Agreement  shall remain in full force and effect in  accordance  with its terms.
DATED as of the date first written above.

OSTEX INTERNATIONAL, INC.                   MOCHIDA PHARMACEUTICAL CO., LTD.


By:      /S/ THOMAS A. BOLOGNA                 By:    EI MOCHIDA
   --------------------------------               -------------------------
      Name:  Thomas A. Bologna                      Name: Ei Mochida Ph.D.
      Its:   President & C.E.O.                     Its:  Chairman









<PAGE>


                     NOTE: CONFIDENTIAL TREATMENT REQUESTED


                            OSTEX INTERNATIONAL, INC.
                               SECOND AMENDMENT TO
                           OSTEOMARK LICENSE AGREEMENT

                                  SCHEDULE 5.7

                            KIT COMPONENT PRICE LIST
                       OSTEOMARK, COMPONENT SET, UNLABELED

<TABLE>
<CAPTION>
                                                                                    PRICE
ITEM         DESCRIPTION                                         QTY    UM          in YEN
- -------------------------------------------------------------------------------------------------
<S>                                                              <C>   <C>         <C>    
 1028        PLATE SEALERS                                        1     PD          XXXXXXX
 6036        ANTI. COATED MICROTITER PL., 1PK                     1     EA          XXXXXXX
 6037        1 NM BCE CALIBRATOR,0.5ML FILLED                     1     EA          XXXXXXX
 6038        30 NM BCE CALIBR., 0.5ML FILLED                      1     EA          XXXXXXX
 6039        100NM BCE CALIBRATOR,0.5ML FILL                      1     EA          XXXXXXX
 6040        300 NM BCE CALIBRATOR,0.5ML FILL                     1     EA          XXXXXXX
 6041        1000NM BCE CALIBRATOR,0.5 ML FILL                    1     EA          XXXXXXX
 6042        3000NM BCE CALIBRATOR,0.5ML FILL                     1     EA          XXXXXXX
 6043        ANTIBODY-CONJUGTE,0.5ML, FILLED                      1     EA          XXXXXXX
 6044        CONJUGATE DILUENT, 30ML, FILLED                      1     EA          XXXXXXX
 6045        BUFFERED SUBSTRATE, 30ML, FILLED                     1     EA          XXXXXXX
 6026        CHROMOGEN REAGENT, 0.9ML FILLED                      1     EA          XXXXXXX
 6046        30X WASH CONCENTRATE,125ML, FILLED                   1     EA          XXXXXXX
 6028        STOPPING REAGENT, 25ML FILLED                        1     EA          XXXXXXX
 6047        LEVEL 1 URINE CONTROL,0.5ML,FILLED                   1     EA          XXXXXXX
 6048        LEVEL 2 URINE CONTROL,0.5ML,FILLED                   1     EA          XXXXXXX
                                                          Total                     XXXXXXX
</TABLE>

<TABLE>
<CAPTION>

                 CRITICAL REAGENT COMPONENT PRICE LIST
             OSTEOMARK, CRITICAL REAGENT COMPONENT SET

                                                                                    PRICE2            PRICE3
ITEM              DESCRIPTION                                   QTY1    UM          in Yen            in Yen
- ------------------------------------------------------------------------------------------------------------------
<S>                                                            <C>   <C>          <C>               <C>              
2027            300 pmol/mL NTx in PBS                         TBD    ML           XXXXXXX           XXXXXXX
2007            NTx Concentrate                                TBD    NM           XXXXXXX           XXXXXXX
2023            1H11 - HRP Conjugate Concentrate               TBD    MG           XXXXXXX           XXXXXXX
                                                                     Total         XXXXXXX           XXXXXXX
- ---------------------------

</TABLE>

1 Prices shown are  sufficient  for  manufacture  of 1 kit of Finished  Product.
Units shipped will depend on quantity of finished  product ordered and the titre
of NTx per lot.
2 Price for orders received by Ostex before July 6, 1999
3 Price for orders received by Ostex on or after July 6, 1999 to December 31,
  2000


Wyeth-Ayerst Laboratories

September 30, 1997
Page 5






                                                              September 30, 1997




Wyeth-Ayerst Laboratories
P.O. Box 8299
Philadelphia, PA 19101-1245

Dear Sirs:

         This  letter  sets  forth  the  proposed  terms and  conditions  for an
extension of the  Agreement  between  Ostex  International,  Inc.  ("OSTEX") and
Wyeth-Ayerst  Laboratories ("W-A") dated September 20, 1995, regarding detailing
of diagnostic  testing,  prevention and treatment of osteoporosis to health care
professionals.

1.       OSTEX  grants  W-A  a   world-wide,   non-exclusive   right  to  detail
         osteoporosis   diagnostic   tests  developed  by  OSTEX  together  with
         technology,  data,  test results,  clinical and other  studies  related
         thereto  and  sales  materials,  medical  education  programs,  disease
         management  programs  and sample  tests so as to  promote  the sale and
         utilization of OSTEX's osteoporosis tests.

2.       W-A  grants  OSTEX  the  non-exclusive  right to  detail  W-A  products
         marketed  by W-A  together  with  promotional,  educational  and  sales
         materials so as to  encourage  the use of W-A's  Premarin(R)  family of
         products in the prevention and treatment of osteoporosis.

3.       It is  understood  and agreed that each party shall  determine,  in its
         sole discretion, the detailing activities it shall undertake, including
         frequency, detail position,  physician targets, field force commitment,
         call plan and whether or not to detail.

4.       The parties  shall  appoint  coordinators  who shall meet  regularly to
         develop  advertising,  marketing and sales  programs,  including  sales
         training  programs,  for the  OSTEX  and W-A  products  to be  detailed
         hereunder.  Such programs may include medical education for health care
         professionals,  disease management  programs for managed care audiences
         and  convention  exhibits  for key target  audiences.  Each party shall
         provide  appropriate  training  materials  and  trainers to educate the
         trainers and/or sales representatives of the other party.

5.       OSTEX  agrees  to  conduct  or  arrange  for the  conduct  of assays to
         generate data derived from  osteoporosis  diagnostic tests developed by
         OSTEX and utilized in patients receiving W-A products. OSTEX grants W-A
         the  non-exclusive  right to utilize  OSTEX test data in detailing  W-A
         products.


<PAGE>

6.       Neither  party shall be obligated to make payments to the other for any
         rights granted or services to be performed hereunder.  Each party shall
         be responsible  for its own expenses in connection  with  negotiations,
         documents, or transactions, services or performance contemplated hereby
         and additionally  neither party shall have any liability whatsoever for
         any fees or expenses of the other party owed to third parties.

7.        Neither party shall have any  responsibility  for the hiring,  
     firing,  compensation or employee benefits of the other party's  employees.
Except as  specifically  set forth herein,  no employee or  representative  of a
party shall have any  authority  to bind or obligate the other party for any sum
or in any manner  whatsoever,  or to create or impose any  contractual  or other
liability on the other party without such other party's written approval.  OSTEX
and W-A's legal  relationship under this Agreement shall be that the parties are
independent of each other and not that of partners or joint  venturers.  Neither
party's  representatives  shall have any authority  regarding sales of the other
party's products or to bind or obligate the other party for any orders,  prices,
discounts,  rebates,  allowances,  etc.,  or  any  other  commercial  terms  and
conditions of sale.

8.       Each  party  hereby  represents  and  warrants  to the  other  that its
         products  shall be  approved  by FDA for  marketing;  that  neither the
         products'  applications  for market  approval nor any other filing with
         FDA or other reports or records shall contain any misrepresentations of
         material fact.  Each party further  represents and warrants that in the
         performance   of  its   obligations   hereunder   each  party  and  its
         representatives  shall at all times  comply with all  applicable  laws,
         rules,  and  regulations  issued  or  promulgated  by any  governmental
         authority  having   jurisdiction   over  the  activities   contemplated
         hereunder.

9.       Each  party  shall give the other  party  notice of all  complaints  or
         adverse experiences associated with the products of the other party. If
         the information  obtained  indicates a serious or unusual experience or
         complaint,  it shall be reported to the other party by  telephone or in
         writing  within   twenty-four   hours  after  initial  receipt.   Other
         information  shall be reported within five working days.  Reports shall
         contain the name,  address and telephone  number of the source,  and an
         indication of the adverse drug experience or other complaint.

10.      All  advertising,  marketing  and sales  promotion  materials  utilized
         hereunder  shall be created by or on behalf of or approved by the party
         whose products are being  described.  Such materials  shall be reviewed
         and  approved  by the other party prior to use by the other party which
         approval shall not be unreasonably withheld. All advertising, marketing
         and sales promotion materials, detailing and other activities by either
         party shall be in  accordance  with approved  product  labeling and all
         applicable laws and regulations.


<PAGE>

11.      No  advertising,   promotional,  sales  or  publicity  concerning  this
         Agreement or the business  relationship  between  OSTEX and W-A created
         hereby or  wherein  the name of the  other  party or its  products  are
         mentioned  shall be released or made use of by anyone  acting on behalf
         of a party  without  the prior  approval  of the other  party.  Nothing
         contained in this  Section 11 shall be deemed to prohibit  either party
         (a)  from  detailing  with  respect  to the  products  of the  other as
         provided herein or (b) from notifying appropriate governmental agencies
         in accordance with, or otherwise complying with the requirements of any
         applicable law or regulation.

12.       The  term of this  Agreement  shall  be for one (1)  year  from  the 
     date  hereof  in  accordance  with  the  provisions  of  Section  12 of the
Agreement  dated  September  20,  1995.  This  Agreement  may  be  extended  for
additional  terms of one (1) year each upon the mutual agreement of the parties.
Either party may terminate this Agreement by thirty (30) days' notice in writing
to the other. Upon the effective date of termination,  the detailing  activities
specified  herein  shall  cease  and  promotional  materials  utilized  shall be
guarantied until disposition is agreed upon by the parties.  Termination of this
Agreement  shall not relieve the parties  hereto of any liability  which accrued
hereunder  prior to the effective date of such  termination  nor preclude either
party from  pursuing all rights and remedies it may have  hereunder or at law or
in equity with  respect to any breach of this  Agreement  nor  prejudice  either
party's  right to obtain  performance  of any  obligation  provided  for in this
Agreement which expressly survives termination.

13.      Nothing  contained  herein  shall be deemed  to grant to OSTEX,  either
         expressly  or  impliedly,  a license or other  right or interest in any
         patent, trademark, trade name or logo or other similar property of W-A,
         except as may be necessary for OSTEX to detail W-A products  hereunder.
         Nothing  contained  herein  shall be  deemed  to  grant to W-A,  either
         expressly  or  impliedly,  a license or other  right or interest in any
         patent,  trademark,  trade name or logo or other  similar  property  of
         OSTEX,  except as may be necessary  for W-A to perform its  obligations
         hereunder.

14.       Each party  shall  indemnify,  defend  and hold  harmless  the other 
     and its officers, directors, agents, servants and employees against any and
all claims,  losses,  damages and liabilities,  including reasonable  attorneys'
fees, but excluding  loss of profits and  consequential  damages,  to the extent
that any such claim,  loss,  damage or liability is based on or  determined by a
court of competent  jurisdiction  to result from or arise out of  utilization of
such party's products.  Provided, however, that a party shall have no obligation
to  indemnify  the other party for any act or omission of the other party or any
employee,  representative  or agent thereof or any product of the other party or
unapproved advertising,  marketing,  promotion or selling activity or warranties
or representations of the other party or any violation of any applicable statute
or regulation, or breach of this Agreement by the other party.


<PAGE>

15.      Except as otherwise expressly provided under this Agreement, each party
         shall hold in confidence all confidential  information  provided by the
         other  party  in   furtherance   of  this   Agreement.   The  foregoing
         confidentiality obligations shall not apply to:

         a)        any information  which at the time of disclosure or 
                   acquisition is part of the public  knowledge or
                   literature,  or  thereafter  becomes part of the public  
                   knowledge or literature  otherwise  than by
                   unauthorized disclosure by the recipient;

         b)        any information  which at the time of disclosure or 
                  acquisition  was in the recipient's  possession
                  as evidenced by its written records; or

         c)        any  information  which  becomes  available  to the  
                   recipient  from any other  source not bound to
                  secrecy to the disclosing party with respect to such 
                  information.

16.      If  the  performance  by  either  party  is  prevented,  restricted  or
         interfered with by reason of any event or cause  whatsoever  beyond the
         reasonable  control  of the  party so  affected,  such  party  shall be
         excused from performance to the extent of such prevention,  restriction
         or interference; provided that such cause is not the result of a breach
         of this  Agreement.  In any such case,  prompt  written notice shall be
         given by the affected party to the other of the existence of such cause
         and of readiness to resume performance.  Labor disputes shall be deemed
         to be events beyond the reasonable  control of the party affected,  and
         neither party shall be required to settle a labor  dispute  against its
         will.

17.       Neither  party may assign  this  Agreement  or rights  granted  
     hereunder  in whole or in part  without  the  written  consent of the other
party  except  to their  affiliates  or  subsidiaries  or to a  successor  to or
assignee of all or substantially all of the pharmaceutical interests, assets and
good will of the assigning  party;  provided,  however,  that W-A shall have the
right to  terminate  this  Agreement  at any time on not less than  fifteen (15)
days'  notice in writing  to OSTEX upon the  occurrence  of any  transaction  or
series of  transactions  which  results in the transfer of ownership or control,
directly or indirectly,  of a majority of the capital stock, with right to vote,
or of  substantially  all of the  assets of OSTEX or of any  parent  company  of
OSTEX.

18.      These  terms and  conditions  constitute  the  complete  and  exclusive
         understanding  of OSTEX  and W-A with  respect  to the  subject  matter
         hereof, and no statements or agreements, oral or written, made prior to
         or at the signing hereof shall modify the written terms hereof. Neither
         party shall claim any  modification or revision of any provision hereof
         unless such modification or revision is in writing, signed by the other
         party and states it is an amendment to this Agreement.


<PAGE>

19.      The  failure on the part of OSTEX or W-A to  exercise  or  enforce  any
         rights  conferred  hereunder  shall not be deemed to be a waiver of any
         such rights nor operate to bar the exercise or  enforcement  thereof at
         any time or times thereafter.

20.      The  construction,  validity and performance of this Agreement shall be
         governed  in all  respects  by the  laws  of  Pennsylvania,  excluding,
         however, its laws respecting choice of law.

          If the foregoing terms and conditions meet with your approval,  please
signify your  acceptance  by signing,  dating and returning the enclosed copy of
this letter.

                                                    Very truly yours,



                                                    OSTEX INTERNATIONAL, INC.

                                                    By: /S/ Thomas A. Bologna
                                                        Thomas A. Bologna
                                                  President and Chief Executive
                                                           Officer

Accepted:

WYETH-AYERST LABORATORIES


By:  /S/ Susan Jasper

Title:  Group Product Director

Date:  October 20, 1997





                           OSTEX INTERNATIONAL, INC.
                            SELECTED FINANCIAL DATA

<TABLE>
<CAPTION>

(IN THOUSANDS, EXCEPT PER SHARE DATA)
- -------------------------------------------------------------------------------------------------------------------
Fiscal Year Ended December 31,                                     1997       1996       1995       1994      1993

<S>                                                          <C>        <C>        <C>         <C>        <C>    <C>
Statement of Operations Data:
Revenues:
          Product sales and research testing services        $   3,658  $   2,860  $   1,830   $  1,152   $   417
          License and research and development fees                450      1,087      1,495        630     1,485
                                                             ------------------------------------------------------
          Total revenues                                         4,108      3,947      3,325      1,782     1,902
                                                             ------------------------------------------------------

Operating expenses:
          Costs of products sold                                   899        926        603        517       226
          Research and development                               4,470      3,163      3,200      3,308     1,940
          Selling, general and administrative                    8,031      9,201      6,583      2,222     1,754
                                                             ------------------------------------------------------
                     Total operating expenses                   13,400     13,290     10,386      6,047     3,920
                                                             ------------------------------------------------------
Loss from operations                                            (9,292)    (9,343)    (7,061)    (4,265)   (2,018)

Other income:
          Proceeds from legal settlement                         6,200          -          -          -         -
          Interest income, net                                     828      1,273      1,684        194       128
                                                             ------------------------------------------------------
                                                             ======================================================
Net loss                                                      $ (2,264)  $ (8,070)  $ (5,377)  $ (4,071)  $(1,890)
- -------------------------------------------------------------======================================================

Basic and diluted net loss per common and
          common equivalent share                             $ (0.18)   $  (0.65)  $  (.045)  $ (0.47)    $    -
- -------------------------------------------------------------======================================================

Shares used in calculation of net loss per share               $ 12,574   $ 12,441   $ 11,929   $  8,737  $     -
- -------------------------------------------------------------======================================================


(IN THOUSANDS)
- -------------------------------------------------------------------------------------------------------------------
December 31,                                                       1997       1996       1995       1994      1993

Balance Sheet Data:
Cash, cash equivalents and short-term
          investments                                          $ 18,965   $ 21,229   $ 27,794   $  3,668  $
                                                                                                             7,916
Working capital                                                  18,368     20,901     28,361      3,172     7,890
Total assets                                                     24,112     25,691     32,841      5,590     8,807
Accumulated deficit                                            (24,128)   (21,864)   (13,794)     (8,417)   (4,346)
Total shareholders equity                                      $ 21,644   $ 23,526   $ 31,518   $  4,698  $  8,460
- -------------------------------------------------------------======================================================

</TABLE>
<PAGE>

MANAGEMENT'S DISCUSSION AND ANALYSIS
OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

Ostex  International,  Inc.  (the  "Company")  is engaged in the  discovery  and
commercialization   of  products   associated   with   osteoporosis   and  other
collagen-related   diseases.   The  Company  believes  its  lead  product,   the
OSTEOMARK-registered  trademark- test,  incorporates  breakthrough technology in
the  area  of  bone  resorption  measurement.  Ostex  has  formed  collaborative
relationships with leading diagnostic and pharmaceutical companies to aid in the
commercialization  of Osteomark.  

     This  Management's  Discussion  and  Analysis of  Financial  Condition  and
Results of  Operations  includes a number of  forward-looking  statements  which
reflect the Company's  current views with respect to future events and financial
performance.  These forward-looking  statements are subject to certain risks and
uncertainties,  including those discussed below, that could cause actual results
to differ materially from historical  results or those  anticipated.  Words used
herein such as  "believes,"  "anticipates,"  "expects,"  "intends,"  and similar
expressions are intended to identify forward-looking  statements but are not the
exclusive means of identifying such statements.  In addition, the disclosures on
page 23 under the caption  "Other  Factors that May Affect  Operating  Results,"
consist  principally  of a brief  discussion  of risks  which may affect  future
results and are thus, in their entirety,  forward-looking in nature. Readers are
urged to  carefully  review and  consider  the various  disclosures  made by the
Company  in this  report  and in the  Company's  other  reports  filed  with the
Securities and Exchange  Commission (the "SEC"),  including the Company's Annual
Report on Form 10-K for fiscal year ended  December  31,  1997,  that attempt to
advise interested parties of the risks and factors that may affect the Company's
business. 

     On May 8, 1995, the Osteomark test first became  commercially  available in
the United States as a urinary assay that provides a quantitative measure of the
excretion  of  cross-linked  N-telopeptides  of type I  collagen  ("NTx")  as an
indicator of human bone resorption.  Prior to becoming  commercially  available,
the Osteomark test was available domestically only for research purposes.

     To date, the Company's  revenues have consisted  primarily of product sales
and fees for  research  testing  services,  as well as  licensing,  research and
development fees from Mochida Pharmaceutical, Co., Ltd. ("Mochida"), and Johnson
& Johnson Clinical Diagnostics,  Inc. ("Johnson & Johnson").  Mochida has agreed
to pay Ostex up to  approximately  $6,600,000 in a combination of licensing fees
and research and development  milestone  payments,  of which $5,850,000 has been
received to date. Under the research and development  agreement,  Mochida has an
option to  license  the NTx  serum  assay  under  development.  Future  payments
totaling $750,000 are contingent upon Mochida's  decision to exercise its option
to license the NTx serum assay and achievement of certain milestones.

     Expenses incurred have been primarily for selling, administrative, research
and  development  activities  and have exceeded  revenues in each year since the
Company's  inception.  As of December 31, 1997,  the Company had an  accumulated
deficit of $24,128,000.  Successful  future operations depend upon the Company's
ability to effectively  commercialize and market its products.  The Company will
require a substantial  amount of additional funds to develop new products and to
fund the level of selling,  general and administrative expenses that the Company
expects to incur in connection with its product commercialization efforts in the
next several years.

RESULTS OF OPERATIONS  

YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995. 

     The Company had  revenues of  $4,108,000  for the year ended  December  31,
1997,  compared to $3,947,000  and  $3,325,000  for the years ended December 31,
1996 and 1995,  respectively.  Revenue from product  sales and research  testing
services  for the year ended  December  31,  1997 was  $3,658,000,  compared  to
$2,860,000  and  $1,830,000  in the  years  ended  December  31,  1996 and 1995,
respectively.  The  increase  of  $798,000  in 1997  and  $1,030,000  in 1996 is
attributable  to higher  volumes  of  Osteomark  kits sold to  laboratories  and
distributors worldwide during those years.

<PAGE>

     License and  research and  development  fees  received  during 1997 totaled
$450,000,  all from Mochida.  License and research and development  fees in 1996
totaled  $1,087,000,  primarily  from  Mochida.  The $637,000  reduction in fees
collected  under license and research and  development  agreements  with Mochida
from 1996 to 1997 was expected and is due to attainment of scheduled milestones.
In 1995 fees of $1,495,000  consisted of  $1,000,000  from Johnson & Johnson and
$495,000 from Mochida.

     The  Company's  cost of products  sold totaled  $899,000 for the year ended
December  31,  1997,  compared to $926,000  and $603,000 for the same periods in
1996 and 1995, respectively. The gross profit rate on product sales for the year
ended  1997 was 75%,  compared  to 68% for 1996 and 67% for 1995.  The change in
gross  profit  rate from 1996 to 1997 and from  1995 to 1996 was a  function  of
increased  manufacturing  volume and  overall  efficiency  gains made in part by
improvements in the production process.  Increased  manufacturing volume reduces
unit cost by spreading  certain fixed overhead  expenses over a higher number of
units produced.

     The Company's  research and development  expenditures  totaled  $4,470,000,
$3,163,000,  and  $3,200,000,  in  1997,  1996,  and  1995,  respectively.   The
$1,307,000 increase from 1996 to 1997 was primarily  attributable to funding the
NTx test point-of-care  development programs with Hologic,  Inc. ("Hologic") and
Metrika,  Inc.  ("Metrika").  In  addition,  research and  development  expenses
increased due to the cost of clinical  studies  commenced at the end of 1996 and
during  1997.  Included  in 1997 was a study  for the  determination  of the NTx
reference range in males, a study to complement physician  interpretation of NTx
results in  postmenopausal  women,  and  preliminary  studies for the use of the
Osteomark test in helping to identify bone  metastases.  Additionally,  research
and development  expenditures increased in 1997 due to the extension of research
grants to the University of Washington ("UW"). Expenditures remained steady from
1995 to 1996 due to an increase in research and development grants and royalties
paid to the Washington  Research Foundation ("WRF") offset by decreased clinical
trial expenditures due to the completion of a clinical trial in November 1995.

     Selling,   general  and   administrative   expenses   totaled   $8,031,000,
$9,201,000,  and  $6,583,000,  in 1997,  1996 and  1995,  respectively.  The 13%
decrease from 1996 to 1997 was primarily due to the  completion of the Company's
free testing program in 1996 and the completion of a hearing before the American
Arbitration Association against Boehringer Mannheim GmbH ("Boehringer Mannheim")
in  September  1996,  partially  offset  by  increased  costs of  litigation  in
connection  with the  Osteometer  and C.R.  Bard lawsuits (see Note number 11 on
page 32 in the Notes to  Financial  Statements).  The 40%  increase  in selling,
general and  administrative  expenses from 1995 to 1996 was due primarily to the
implementation of marketing programs to support the Osteomark test in the United
States,  the addition of sales  personnel to support  these  efforts,  increased
legal  costs  involved  with the  Boehringer  Mannheim  arbitration  and  patent
litigation costs.

     Proceeds from legal settlement resulted from the receipt of a non-recurring
payment of $6,200,000 from  Boehringer  Mannheim in October 1997. The settlement
between the two parties was the result of a ruling by the  American  Arbitration
Association awarding damages to the Company in connection with a dispute between
the Company and Boehringer Mannheim.

     Interest income totaled $901,000,  $1,317,000, and $1,684,000 for the years
ended December 31, 1997, 1996, and 1995, respectively.  The decrease in 1997 and
1996 was primarily due to lower average invested  balances  resulting from using
cash to fund the Company's operating losses.

     At December 31, 1996, the Company had tax net operating loss  carryforwards
of $29,527,000, which will begin to expire in 2004. Income taxes are provided in
the  Statements of  Operations as required by Statement of Financial  Accounting
Standards No. 109,  "Accounting  For Income Taxes" ("SFAS No. 109").  Under SFAS
No. 109,  deferred taxes are determined  using an asset and liability  approach.
The Company has  determined  that the tax assets do not satisfy the  recognition
criteria set forth in SFAS No. 109. Accordingly, a valuation adjustment has been
recorded  against the  applicable  deferred  tax assets,  and  therefore  no tax
benefit has been recorded.


<PAGE>

LIQUIDITY  AND CAPITAL  RESOURCES  

     The Company has financed its operations  from inception  primarily  through
three  private  placements  of  preferred  stock  that  provided   approximately
$12,800,000  aggregate  proceeds,  and its initial public  offering of 3,645,642
shares of common stock that provided net proceeds of approximately  $32,000,000.
Funds  of  approximately  $16,608,000  have  been  generated  through  sales  of
Osteomark  test  kits and  fees for  research  testing  services,  collaborative
research and licensing  agreements.  The settlement of a dispute with Boehringer
Mannheim provided an additional $6,200,000. As of December 31, 1997, the Company
had $18,965,000 in cash and cash equivalents and short-term investments, working
capital of $18,368,000 and total  shareholders'  equity of  $21,644,000.  During
1997, cash, cash equivalents and short-term investments decreased by $2,264,000,
working capital  decreased by $2,533,000 and  shareholders'  equity decreased by
$1,882,000.  The  decreases  were  primarily the result of the net loss incurred
during 1997.

     The  Company  used  $1,181,000  of cash for  operating  activities  in 1997
($7,381,000 excluding the receipt of $6,200,000 from Boehringer  Mannheim),  and
$1,105,000   for   laboratory   expansion   and  the  purchase  of   laboratory,
manufacturing  and office  equipment.  In 1996, the Company  entered into a note
agreement  that provides up to $1,500,000  for  expansion of  manufacturing  and
administrative  facilities and has borrowed  $746,000 against the note. The note
is  repayable in 48 equal  monthly  installments  of  principal  and interest of
$19,784.  As of December 31, 1997,  outstanding  borrowings under this agreement
amounted to $509,000.  The Company  does not  anticipate  additional  borrowings
during 1998 and has no material capital purchase commitments.

     The  Company's  future  capital  requirements  depend  upon  many  factors,
including  effectiveness  of Osteomark  test  commercialization  activities  and
arrangements;  continued  scientific  progress in its research  and  development
programs; the costs involved in filing, prosecuting and enforcing patent claims;
the costs involved in legal efforts to enforce  patent rights;  and the time and
costs involved in obtaining regulatory  approvals.  Additional funds from equity
or  debt  financing  will be  required.  There  can be no  assurance  that  such
additional funds will be available on favorable terms, if at all. Because of the
Company's  significant  long-term  cash  requirements,  it  may  seek  to  raise
additional  capital if conditions in the public  equity  markets are  favorable,
even if the Company does not have an immediate need for additional  cash at that
time. If additional financing is not available, the Company anticipates that its
existing  available cash, its future license and research revenues from existing
collaboration agreements, its current level of product sales and interest income
from  short-term  investments  will be adequate to fund its  operations  through
1999.

OTHER FACTORS THAT MAY AFFECT OPERATING  RESULTS 

     The  Company's  operating  results may fluctuate due to a number of factors
including,  but not limited  to,  volume and timing of product  sales,  pricing,
market acceptance of the Company's products, changing economic conditions in the
healthcare  industry,  activities of competitors,  delays and increased costs of
product  and  technology  development,  the  Company's  ability to  develop  and
maintain collaborative  arrangements,  the outcome of litigation, and the effect
of the  Company's  accounting  policies and other risk  factors  detailed in the
Company's 1997 Form 10-K and other SEC filings. All of the foregoing factors are
difficult  for the Company to predict and can  materially  adversely  affect the
Company's business and operating results.

     The Company is  currently  in the  process of  evaluating  its  information
technology  infrastructure  for the Year 2000  compliance.  The Company does not
expect that the cost to modify its information  technology  infrastructure to be
Year 2000  compliant  will be material to its financial  condition or results of
operations.  The Company  does not  anticipate  any material  disruption  in its
operations  as a result of any failure by the Company to be in  compliance.  The
Company  does  not  currently  have any  information  concerning  the Year  2000
compliance  status of its suppliers and customers.  In the event that any of the
Company's  significant  suppliers or customers does not  successfully and timely
achieve Year 2000  compliance,  the Company's  business or  operations  could be
adversely affected.

<PAGE>

                                 BALANCE SHEETS
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)



December 31,                                               1997      1996

ASSETS

Current Assets:
         Cash and cash equivalents                       $ 2,201   $ 1,289
         Short-term investments                           16,764    19,940
         Trade receivables and other current assets, 
         net of allowance of $25 in 1997 and 1996          1,344     1,161
         Inventory, at cost                                  201       153
                                                         -----------------
                  Total current assets                    20,510    22,543
                                                         -----------------

Property, Plant and Equipment, net of 
accumulated depreciation                                   2,965     2,474
Other Assets                                                 637       674
                                                         -----------------
                  Total assets                           $24,112  $ 25,691
                                                         =================

LIABILITIES AND SHAREHOLDERS' EQUITY 

Current Liabilities:
         Accounts payable                               $  1,429   $ 1,259
         Accrued expenses                                    530       234
         Current portion of note payable                     183       149
                                                        ------------------
                  Total current liabilities                2,142     1,642
                                                        ------------------

Noncurrent Liabilities:
         Note payable, net of current portion                326       523
                                                        ------------------

Commitments and Contingencies

Shareholders' Equity:
         Common stock, $.01 par value, 50,000,000 
          shares authorized; 12,696,250 and 12,441,617 
          issued and outstanding, respectively               127       125
         Additional paid-in capital                       45,642    45,195
         Unrealized gain on short-term investments             3        70
         Accumulated deficit                             (24,128)  (21,864)
                                                         -----------------
                  Total shareholders' equity              21,644    23,526
                                                         -----------------
                  Total liabilities and 
                   shareholders' equity                  $24,112   $25,691
                                                         ================= 

THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE FINANCIAL STATEMENTS.


<PAGE>

                            STATEMENTS OF OPERATIONS

                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>

Year Ended December 31,                                     1997         1996      1995
<S>                                                       <C>          <C>       <C>   
Revenue:
     Product sales and research testing services          $ 3,658      $ 2,860   $ 1,830
     License and research and development fees                450        1,087     1,495
                                                          ------------------------------
               Total revenues                               4,108        3,947     3,325

Operating Expenses:
      Cost of products sold                                   899          926       603
      Research and development                              4,470        3,163     3,200
      Selling, general and administrative                   8,031        9,201     6,583
                                                          ------------------------------
               Total operating expenses                    13,400       13,290    10,386
                                                          ------------------------------
               Loss from operations                        (9,292)      (9,343)   (7,061)

Other Income (Expense):
         Proceeds from legal settlement                     6,200          -         -
         Interest income                                      901        1,317     1,684
         Interest expense                                     (73)         (44)      -
                                                          ------------------------------
                  Net loss                                $(2,264)     $(8,070)  $(5,377)
                                                          ==============================
 
Basic and diluted net loss per common and 
common equivalent share                                   $ (0.18)     $ (0.65)  $ (0.45)
                                                          ============================== 
Shares used in calculation of net loss per share           12,574       12,441    11,929
                                                          ==============================
</TABLE>

THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE FINANCIAL STATEMENTS.

<PAGE>

                            STATEMENTS OF CASH FLOWS

                                 (IN THOUSANDS)
<TABLE>
<CAPTION>

Year Ended December 31,                                      1997         1996     1995
<S>                                                       <C>          <C>       <C>   
Cash Flows from Operating Activities:
         Net loss                                         $(2,264)     $(8,070)  $(5,377)
         Adjustments to reconcile net loss to net 
               cash used in operating activities
                      Depreciation and amortization           651          504       295
                      Expense from stock awards 
                       and grants                             197           33        40
                      (Increase) decrease in receivables      (10)         554    (1,318)
                      (Increase) decrease in inventory        (48)          83      (161)
                      (Increase) in other current assets     (173)         (61)      (15)
                      Increase in accounts payable 
                       and accrued expenses                   466          170       511
                                                           -----------------------------
                          Net cash used in operating 
                           activities                      (1,181)      (6,787)   (6,025)
                                                           -----------------------------
Cash Flows from Investing Activities:
         Purchases of short-term investments              (20,426)     (22,958)  (52,521)
         Proceeds from sales and maturities of 
          short-term investments                           23,535       24,575    32,996
         Purchases of property, plant and equipment        (1,105)        (495)   (1,746)
         Long-term investments                                -             -       (500)
                                                           -----------------------------
                          Net cash provided by (used 
                           in) investing activities         2,004        1,122   (21,771)
                                                           -----------------------------
Cash Flows from Financing Activities:
         Net proceeds from issuance of common stock
                  and exercise of stock options               252           41    32,166
         Proceeds from borrowings on note payable              -           746       -
         Payments on note payable                            (163)         (74)      -
         Proceeds from stock subscription payment              -            -        165
                                                           -----------------------------
                          Net cash provided by 
                           financing activities                89          713    32,331
                                                           -----------------------------

                          Net Increase (Decrease) in 
                           Cash and Cash Equivalents          912       (4,952)    4,535
                          Cash and Cash Equivalents, 
                           beginning of period              1,289        6,241     1,706
                                                           -----------------------------
                          Cash and Cash Equivalents, 
                           end of period                  $ 2,201      $ 1,289   $ 6,241
                                                           =============================

Supplemental Disclosure of Noncash Transactions:
         Stock granted for research and 
          development services                            $   191      $   -     $   -
                                                           =============================
</TABLE>

THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE FINANCIAL STATEMENTS.

<PAGE>

                       STATEMENTS OF SHAREHOLDERS' EQUITY

                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                               Unrealized
                                                                   Additional  Gain/Loss on  Stock                     Total      
                                    Preferred Stock  Common Stock  Paid-In     Short-term    Subscriptions Accumulated Shareholders'
                                    Shares  Amount  Shares  Amount Capital     Investments   Receivable    Deficit     Equity
<S>                                <C>      <C>     <C>     <C>   <C>              <C>       <C>           <C>        <C>          
Balance, December 31, 1994          1,059    $10     3,011   $30   $13,240          $-        $(165)       $(8,417)    $ 4,698
                                    -----------------------------------------------------------------------------------------------
 
    Sale of common stock in initial
      public offering and 
      conversionof preferred stock (1,059)   (10)    9,153    92    31,468           -           -              -       31,550
    Compensation expense for stock
      option grants                   -        -       -       -        40           -           -              -           40
    Stock options and warrants
      exercised                       -        -      269      3       373           -           -              -          376
    Payment for subscription
      receivable                      -        -       -       -        -            -          165             -          165
    Unrealized gain on short-term
      investments                     -        -       -       -        -           66           -              -           66
    Net loss                          -        -       -       -        -            -           -           (5,377)    (5,377)
Balance, December 31, 1995            -        -   12,433    125    45,121          66           -          (13,794)    31,518

    Compensation expense for stock
      option grants                   -        -       -       -       33            -           -              -           33
    Stock options exercised           -        -       9       -       41            -           -              -           41
    Unrealized gain on short-term
      investments                     -        -       -       -       -             4           -              -            4
    Net loss                          -        -       -       -       -             -           -          (8,070)     (8,070)
Balance, December 31, 1996            -        -   12,442    125    45,195          70           -         (21,864)     23,526

    Expense for stock and
      option grants                   -        -      70       -       197           -           -              -          197
    Stock options exercised           -        -     184       2       250           -           -              -          252
    Unrealized loss on short-term
      investments                     -        -      -        -        -          (67)          -              -          (67)
    Net loss                          -        -      -        -        -            -           -          (2,264)     (2,264)
Balance, December 31, 1997            -       $-   12,696   $127   $45,642          $3         $ -        $(24,128)    $21,644

</TABLE>

THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE FINANCIAL STATEMENTS.

<PAGE>


                         NOTES TO FINANCIAL STATEMENTS

               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)

NOTE 1

ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
ORGANIZATION

     Ostex International,  Inc. (the "Company"),  a Washington  Corporation,  is
engaged in the  discovery  and  commercialization  of products  associated  with
osteoporosis and other collagen-related  diseases. The Company believes its lead
product, the Osteomark-registered trademark- NTx test, incorporates breakthrough
technology in the area of bone resorption  measurement.  The Company markets the
Osteomark NTx test through laboratories and distributors worldwide.

     The Company was incorporated in the state of Washington on May 11, 1989 and
completed  its initial  public  offering of common stock in February  1995.  The
United  States  has been the  Company's  principal  market.  Foreign  sales were
approximately $652, $370 and $528 in 1997, 1996 and 1995, respectively.  Foreign
sales were primarily to Europe and Japan.

ESTIMATES  AND  UNCERTAINTIES  

     The  preparation  of financial  statements  in  conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions that affect the reported  amounts of assets and liabilities.  Actual
results could differ from those estimates.

REVENUE  RECOGNITION  

     License and research and development fees are recognized upon attainment of
the  agreed-upon  milestones.  Research  testing  fees are  recognized  when the
services are substantially complete. Product sales are recognized upon shipment.

RESEARCH  AND  DEVELOPMENT  EXPENSES  

     Research and development costs are expensed as incurred.

PROPERTY,  PLANT AND  EQUIPMENT

     Property,  plant and equipment are stated at cost and depreciated using the
straight-line  method over the  estimated  useful  life of the asset.  Estimated
lives range from five to 10 years.  Depreciation  expense  charged to operations
during 1997, 1996 and 1995 was $614, $502 and $294, respectively.

SHORT-TERM INVESTMENTS  

     The Company  considers  all of its  investments  as  "available  for sale,"
reporting them at fair market value with unrealized gains and losses included in
Shareholders'  Equity.  Realized  gains  and  losses  and  declines  in value of
securities judged to be other than temporary are included in income.

INVENTORY  

     Inventory  consists  principally  of  raw  materials  and  finished  goods.
Inventories are stated at the lower of cost (first-in, first-out) or market.

STATEMENTS OF CASH FLOWS 

     For the purpose of the statements of cash flows, the Company  considers all
highly  liquid debt  instruments  with a maturity  of three  months or less when
purchased to be cash  equivalents.  The carrying amount  approximates fair value
due to the short maturity of these instruments.

NET LOSS PER  COMMON  AND COMMON  EQUIVALENT  SHARE 

     The Company adopted SFAS No. 128,  "Earnings per Share," effective December
15, 1997. Basic net loss per share is the net loss divided by the average number
of shares  outstanding during the year. Diluted net loss per share is calculated
as the net loss divided by the sum of the average  number of shares  outstanding
during the year plus the net  additional  shares that would have been issued had
all dilutive options been exercised,  less shares that would be repurchased with
the  proceeds  from such  exercise  (Treasury  Stock  Method).  During all years
presented,   the  effect  of  including  outstanding  options  is  antidilutive,
therefore,  options have been excluded from the  calculation of diluted net loss
per share. There is no difference between previously reported net loss per share
and the basic and diluted net loss per share.


<PAGE>

NOTE 2 

OTHER ASSETS 

     Other assets primarily include investments totaling $637 in preferred stock
of Metrika,  Inc., a privately held medical  device  company in the  development
stage.  The investment is recorded in the accompanying  financial  statements at
cost and represents an ownership interest of less than 10%.

NOTE 3 

PROPERTY,  PLANT & EQUIPMENT 

     Property,  plant & equipment at December 31, 1997 and 1996 consisted of the
following:
                                         1997    1996

Leasehold improvements                $ 2,426  $ 1,463
Laboratory and manufacturing
         equipment                      1,277    1,198
Computers and office equipment            975      912
                                       ---------------
                                        4,678    3,573
Accumulated depreciation and
         amortization                  (1,713)  (1,099)
                                       ---------------
Net property, plant and equipment     $ 2,965  $ 2,474
                                       ===============


NOTE 4

SHORT-TERM INVESTMENTS

The Company's short-term investments at December 31, 1997 and 1996, consisted of
the following:
                                             1997    1996

United States treasury obligations         $7,955   $8,807
Federal agency obligations and
         discount notes                     2,686    7,706
Government agency obligations               3,389      -
Corporate and municipal bonds               2,734    3,427
                                           ---------------
                                          $16,764  $19,940
                                           ===============
The maturity of all classes of the  Company's  short-term  investments  was less
than two years at December 31, 1997 and 1996.

NOTE 5

ACCRUED EXPENSES

Accrued expenses at December 31, 1997 and 1996, consisted of the following:

                                            1997    1996

Business taxes payable                      $359    $127
Accrued wages, benefits and
         payroll taxes                       171     107
                                            ------------
                                            $530    $234
                                            ============
NOTE 6

NOTE PAYABLE

In July  1996,  the  Company  borrowed  $746  under a  secured  promissory  note
agreement.  The note is secured by real property and equipment and is payable in
equal monthly  installments  of principal and interest of $20. The interest rate
is based on the three-year U.S.  Treasury Note, at the time of drawdown,  plus a
margin of 5.80%,  (12.5% as of December 31, 1997 and 1996).  The note  agreement
allows the Company to make additional borrowings,  up to a maximum of $1,500 for
future capital needs.  The note contains a number of covenants that, among other
things, require the Company to meet specific financial ratios, including minimum
tangible net worth,  maximum  liabilities to total net worth and a minimum level
of cash,  cash  equivalents  and  short-term  investments.  The  Company  was in
compliance with these covenants at December 31, 1997 and 1996. Minimum principal
payments are as follows: 

1998          $183 
1999           207
2000           119
              ----
              $509


<PAGE>

NOTE 7

SHAREHOLDERS' EQUITY

INITIAL PUBLIC OFFERING

On January  25,  1995 the  Company  completed  its  initial  public  offering of
3,645,642  shares of common  stock at $9.50 per share for  proceeds  of $34,634,
less underwriting discounts,  commissions and other offering costs approximating
$3,085. Convertible preferred stock outstanding immediately prior to the closing
was converted  into  5,506,464  shares of common  stock.  

STOCK OPTION PLANS 

     The Company has three stock option  plans;  the Amended and Restated  Stock
Option Plan (the "Old Plan"), the 1994 Stock Option Plan (the "1994 Plan"), both
administered by the  Compensation  Committee of the Board of Directors,  and the
Directors' Nonqualified Stock Option Plan (the "Directors' Plan"), (collectively
the "Stock  Option  Plans").  The Old Plan no longer  permits  additional  stock
option  grants.  The 1994  and  Directors'  Plans  were  amended  in 1997 by the
shareholders  to  increase  the number of options  that  could be  reserved  for
issuance under these plans.  Shares of common stock reserved for issuance to the
Company's employees and directors under the Stock Option Plans are 2,107,000 and
350,000, respectively, and shares available for grant to the Company's employees
and directors at December 31, 1997, under the Stock Option Plans are 259,000 and
145,000, respectively.  Under all option plans, as of December 31, 1997, options
for 667,000  shares have been  exercised,  and  1,962,000  shares are subject to
outstanding  options at exercise  prices  ranging  from $.08 to $17.13 per share
with a remaining  weighted average  contractual  life of 8 years.  These options
vest over periods of two to four years.  Total options vested as of December 31,
1997 were 481,000,  with a weighted average exercise price of $3.34. All options
granted under these plans expire either 90 days after  termination of employment
or 10 years from the date of grant, whichever occurs first.

     Prior  to the  Company's  initial  public  offering,  the  Company  granted
nonqualified  options  under  the Old Plan  whose  exercise  price was below the
estimated fair market value of the Company's  common stock on date of grant. The
difference  between the grant price and the estimated  fair market value on date
of grant is recognized as compensation  expense over the vesting  period.  Total
compensation  expense recognized was approximately $6, $33 and $40 in 1997, 1996
and 1995,  respectively.  Information relating to stock options outstanding and
stock options exerciseable at December 31, 1997 is as follows:

<TABLE>
<CAPTION>

                                      Options Outstanding                          Options Exerciseable
                          -------------------------------------------------     ----------------------------
                                        Weighted Average   Weighted Average 
Range of Exercise         Number        Remaining Life     Exercise Price       Number       Weighted Average
Prices                    of shares     in Years                                of Shares    Exercise Price
<S>                      <C>            <C>                <C>                  <C>          <C>             
$ .08 -  $ .80                78,750             3                  $.42              78,750      $  .42
$2.10 -  $5.00             1,825,001             9                 $3.27             378,367      $ 3.45
$5.75 - $17.13                58,550             8                 $9.33              24,334      $11.04
                         -----------------------------------------------------------------------------------
                           1,962,301             8                 $3.34             481,451      $ 3.34
                         ===================================================================================

</TABLE>

<PAGE>


Information  relating to activity  under the Company's stock option plans 
is as follows:

                                                Weighted
                                    Shares       Average
                                  Subject to    Exercise     
                                    Option        Price

Balance, December 31, 1994        1,545,190     $ 3.19
         Granted                    245,500       9.09
         Exercised                 (268,786)      1.38
         Canceled                   (90,625)      3.56
                                  -----------------------
Balance, December 31, 1995        1,431,279       4.51
         Granted                    446,000      12.30
         Exercised                   (8,950)      4.56
         Canceled                   (40,703)      9.64
                                  -----------------------
Balance, December 31, 1996        1,827,626       6.61
         Granted                  2,227,925       3.76
         Exercised                 (184,000)      1.37
         Canceled                (1,909,250)      7.14
                                  -----------------------
Balance, December 31, 1997        1,962,301     $ 3.34
                                  =======================


The Company has adopted the disclosure-only provisions of Statement of Financial
Accounting  Standards  No.  123  (SFAS No.  123),  "Accounting  for  Stock-Based
Compensation."  Accordingly,  no compensation cost has been recognized for stock
options issued at market value on the date of grant. Had  compensation  cost for
the Company's two stock option plans been determined  based on the fair value of
the options at the grant date for awards in 1997,  1996 and 1995 consistent with
the  provisions  of SFAS 123,  the  Company's  net loss and net loss per  common
equivalent share would have changed to the pro forma amounts indicated below:

                                    1997      1996       1995

Net loss - as reported           $(2,264)   $(8,070)  $(5,377)
Net loss - pro forma             $(2,222)   $(8,729)  $(5,528)
Basic and diluted net
         loss per common
         and common
         equivalent share -
         as reported               $(.18)     $(.65)    $(.45)
Basic and diluted net
         loss per common
         and common
         equivalent share -
         pro forma                 $(.18)     $(.70)    $(.46)

The fair value of each option  grant is  established  on the date of grant using
the  Black-Scholes  option-pricing  model  with the  following  weighted-average
assumptions  used  for  new  grants  in  1997:  zero  dividend  yield;  expected
volatility of 85.3%; risk-free interest rates varying by grant date between 6.4%
and 7.1%; and expected lives of five years.  Assumptions  for options granted in
1996 were: zero dividend yield;  expected  volatility of 59%; risk-free interest
rates between 5.8% and 6.5%;  and expected  lives of five years.  The difference
between reported and pro forma net loss in 1997 is a $42 credit to income as the
model  recognizes  canceled  options in the period they occur.  The SFAS No. 123
method of accounting has not been applied to options granted prior to January 1,
1995,   therefore  the  resulting  pro  forma   compensation  cost  may  not  be
representative  of  that  to be  expected  in  future  years.  

NOTE 8  

LICENSING AGREEMENTS 

Under the Company's  worldwide  exclusive license agreements with the
Washington Research Foundation ("WRF"), the Company has the right to manufacture
and market  technology  developed  from certain  research by the  University  of
Washington  ("UW").  As  consideration  for the  licenses  acquired  and for the
attainment  of certain  milestones,  the Company paid WRF certain  nonrefundable
fees  and  issued  common  stock to the WRF and UW.  In  addition,  future  cash
payments  up to $500 and common  stock  grants of up to 5,000  shares may be due
upon attainment of certain other milestones.  All legal costs incurred by WRF in
connection  with the filing,  prosecution,  and  maintenance of certain  defined
patent rights, are paid by the Company.  During 1997, 1996 and 1995, the Company
incurred  approximately $123, $154 and $379 of license fees, including the value
of stock grants, and patent legal expenses. All license and legal fees and stock
grants have been  expensed as research  and  development  costs.  The Company is
obligated to pay WRF  royalties on net sales of any  licensed  products.  


<PAGE>

NOTE 9

REVENUES 

The Company has a sublicense  agreement and a research and  development
agreement  with  Mochida   Pharmaceutical  Co.,  Ltd.  ("Mochida").   Under  the
sublicense agreement, the Company granted exclusive manufacturing, marketing and
distribution  rights to  certain of the  Company's  products  in Japan.  Through
December 31, 1997, the Company had earned fees and milestone payments of $2,000,
including  $450  during  1997,  in  connection  with this  agreement.  Under the
research and development  agreement,  the Company earned no fees during 1997 and
$1,080 and $550 during 1996 and 1995, respectively. As of December 31, 1997, the
Company had received all milestone  payments to be earned in connection with the
license  agreement  for the urine  assay.  Mochida  has an option to license the
Company's serum assay under  development.  

During 1995, the Company entered into
research,  development,  license and supply  agreements  with  Johnson & Johnson
Clinical Diagnostics, Inc. ("JJCD") under which Ostex earned $1,000 during 1995.
These  agreements  grant  JJCD a license  to  manufacture,  sell and  distribute
certain products  utilizing Ostex' bone resorption  technology.  Ostex will also
receive royalties on JJCD sales of products  incorporating the Ostex technology.

NOTE 10 

RELATED PARTY TRANSACTIONS  

Research  Agreements The Company has entered
into two research  agreements  with the  University of  Washington  which extend
through  December 31, 1999.  Total expense was $499,  $304 and $185 during 1997,
1996 and 1995, respectively.  Following is a schedule of future minimum payments
under these agreements as of December 31, 1997:

1998      $428 
1999       310
          -----
          $738

NOTE 11

COMMITMENTS AND CONTINGENCIES

LEASES

The Company has entered into noncancelable operating leases for office space and
certain equipment. Future minimum payments under these leases are as follows:

1998                      $  514
1999                         501
2000                         494
2001                         496
2002                         527
                          ------
                          $2,532
                          ======

Total rent expense was approximately $584, $538 and $374 in 1997, 1996 and 1995,
respectively. 

LITIGATION 

     In June 1996,  the Company  filed an action in the United  States  District
Court for the Western District of Washington  against  Osteometer Biotech A/S, a
medical  technology  company  based in Denmark  ("Osteometer"),  and  Diagnostic
Systems  Laboratories  Inc. for patent  infringement of United States Patent No.
5,455,179.   The  Company  believes  Osteometer's  bone  resorption  immunoassay
incorporates technology which infringes patented Ostex technology.  In September
1996, the defendants  filed a response denying  infringement and  counterclaimed
that Ostex'  patent is invalid and  unenforceable.  By order dated July 7, 1997,
the Court  granted  Ostex'  motion to file a  supplemental  complaint,  to add a
second  cause of action based upon United  States  Patent No.  5,641,837,  which
issued on June 24, 1997. On October 24, 1997, Ostex filed a second  supplemental
complaint to add third and fourth  causes of action  based upon U.S.  Patent No.
5,652,112,  which issued on July 29, 1997, and U.S. Patent No. 5,656,439,  which
issued  on August  12,  1997.  The  lawsuit  is  currently  scheduled  for trial
commencing  October 20, 1998. At the present time management  cannot predict the
outcome  of the  lawsuit  but  intends  to  continue  to  vigorously  assert its
position.


<PAGE>

     On April 9, 1997, the Company was served with a lawsuit filed in the United
States  District  Court,  Central  District of  California  by C.R.  Bard,  Inc.
("Bard").  The complaint  alleges that Ostex' Osteomark  product  infringes U.S.
Patent No. 4,628,027 assigned to Bard in 1993. On June 4, 1997 the Company filed
a response denying infringement and counterclaimed that Bard's patent is invalid
and  unenforceable.  On  November 7, 1997 the judge set a trial date of November
10,  1998,  and on December  27,  1997,  the Company  filed a motion for summary
judgment.  Management  believes  that this suit is without merit and that Ostex'
Osteomark product falls outside the claims of the subject patent.

NOTE 12

OTHER INCOME - PROCEEDS FROM LEGAL  SETTLEMENT 

     On  November 4, 1997,  the Company  announced  settlement  with  Boehringer
Mannheim GmbH  ("Boehringer  Mannheim")  under which the Company received a lump
sum payment of $6,200.  The settlement between the two parties was the result of
a ruling by the American Arbitration Association awarding damages to the Company
in connection with a dispute between the Company and Boehringer Mannheim.

NOTE 13 

FEDERAL INCOME TAXES 

Deferred taxes
are determined using an asset and liability  approach.  The Company has incurred
operating  losses since  inception and  accordingly  has determined that the net
deferred tax assets do not satisfy recognition criteria.  Therefore, a valuation
allowance  has been  recorded  against  the net  deferred  tax assets and no tax
benefit has been  recorded in the  accompanying  statements of  operations.  The
change in the  valuation  allowance  during  1997 and 1996 was $586 and  $3,006,
respectively. The Company's deferred tax assets (liabilities) are as follows:

         December 31,         1997       1996      1995

Net operating loss
         carryforward      $10,039      $9,448    $6,576
Research and
         experimentation
         credits               363         313       135
Excess of market value
         over the exercise
         price of common
         stock options          77          77        65
Section 195 start-up
         expenses                -          52        151
Amortization and
         depreciation          (47)        (44)       (64)
Other                           68          68         45
                           -------------------------------
Gross deferred
         tax asset          10,500       9,914       6,908
Valuation allowance        (10,500)     (9,914)     (6,908)
                           -------------------------------  
Net deferred tax asset     $    -       $   -      $   -
                           ===============================

At December 31, 1997,  the Company had tax net operating loss  carryforwards  of
$29,527 which expire between 2004 and 2012.

<PAGE>

REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Shareholders of Ostex International, Inc.:

We have audited the accompanying balance sheets of Ostex International,  Inc. (a
Washington  corporation)  as of  December  31,  1997 and 1996,  and the  related
statements of  operations,  shareholders'  equity and cash flows for each of the
three years in the period ended December 31, 1997.  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  financial  statements  referred to above present  fairly,  in all
material  respects,  the financial position of Ostex  International,  Inc. as of
December 31, 1997 and 1996 and the results of its  operations and its cash flows
for each of the three years in the period ended December 31, 1997, in conformity
with generally accepted accounting principles.

                                           /S/ ARTHUR ANDERSEN LLP

Seattle, Washington
February 13, 1998

<PAGE>


CORPORATE DIRECTORY

BOARD OF DIRECTORS

Thomas J. Cable
Chairman of the Board of Directors

Thomas A. Bologna
President and Chief Executive Officer

Elisabeth L. Evans, M.D.
Physician, Obstetrics and Gynecology,
Overlake Obstetricians and Gynecologists, P.C.

David R. Eyre, Ph.D.
Co-Founder;
Burgess Chair of Orthopedic Research,
University of Washington

Fredric J. Feldman, Ph.D.
President, FJF Associates

Gilbert S. Omenn, M.D., Ph.D.
Executive Vice President for Medical Affairs
University of Michigan Health System

Gregory D. Phelps

John H. Trimmer

EXECUTIVE OFFICERS
AND MANAGEMENT

Thomas A. Bologna
President and Chief Executive Officer

John M. Brenneman
Director, Finance and Operations

Thomas F. Broderick
Vice President, Patent and General Counsel

J. Daniel Clemens
Director, Research and Development

Donna J. DeLong
Vice President, Marketing

Robert M. Littauer
Senior Vice President, Finance and Administration

Nancy J.S. Mallinak
Vice President, Regulatory and Clinical Affairs

Cory J. Smith
Director, Manufacturing

William K. Strelke
Vice President, Sales

SCIENTIFIC ADVISORY BOARD

Charles H. Chesnut III, M.D.
Chair, Ostex Scientific Advisory Board; Professor of Medicine and Radiology,
Professor of Nutritional Sciences, Adjunct Professor of Orthopedics, University
of Washington

Elizabeth Barrett-Connor, M.D.
Professor and Chair, Family and Preventive Medicine; Director, Division of
Epidemiology, University of
California, San Diego

Laurence M. Demers, Ph.D.
Distinguished Professor, Departments of Pathology
and Medicine; Director of Clinical Chemistry, Core-Endocrine Laboratory, The
Pennsylvania State Geisinger Health System, The Milton S. Hershey Medical
Center, The Pennsylvania State University College of Medicine

David R. Eyre, Ph.D.
Burgess Chair of Orthopedic Research, Adjunct Professor of Biochemistry and Oral
Biology, Director, Orthopedic Research Laboratories, University of Washington

C. Conrad Johnston, Jr., M.D.
Professor of Medicine, Indiana School of Medicine;
Director, Division of Endocrinology and Metabolism, Indiana University Medical
Center

Howard Judd, M.D.
Chairman, Department of Obstetrics and Gynecology, Olive View/UCLA Medical
Center; Professor,
Department of Obstetrics and Gynecology, Chief,
Division of Reproductive Endocrinology, UCLA
Clinical Center for Women's Health Initiative

Robert Lindsay, M.D., Ph.D.
Chief of Internal Medicine, Helen Hayes Hospital
New York; President, National Osteoporosis Foundation

Allan Lipton, M.D.
Professor, Department of Medicine; Chief, Division
of Oncology, The Milton S. Hershey Medical Center,
The Pennsylvania State University

Veronica Ravnikar, M.D.
Professor of Obstetrics and Gynecology, Director of Reproductive Endocrinology
and Infertility, University
of Massachusetts Medical Center

Markus Seibel, M.D.
Head, Endocrine and Osteodiagnostic Laboratories, Department of Medicine,
Division of Endocrinology & Metabolism, University of Heidelberg, Germany

Frederick R. Singer, M.D.
Medical Director, Osteoporosis/Metabolic Bone Disease Program, St. Johns 
Hospital and Health Center;
Professor of Medicine in Residence, UCLA

<PAGE>

SHAREHOLDER INFORMATION

CORPORATE HEADQUARTERS

Ostex International, Inc.
2203 Airport Way South, Suite 400
Seattle, WA  98134-9967
Tel:     (206) 292-8082
Fax:     (206) 292-8625

INDEPENDENT ACCOUNTANTS

Arthur Andersen LLP
801 Second Avenue, Suite 800
Seattle, WA  98104

LEGAL COUNSEL

Perkins Coie LLP
1201 Third Avenue, 40th Floor
Seattle, WA  98101

TRANSFER AGENT AND REGISTRAR

ChaseMellon Shareholder Services L.L.C.
Overpeck Centre
85 Challenger Road
Ridgefield Park, NJ 07660
Website: www.chasemellon.com

INVESTOR RELATIONS

Lippert/Heilshorn & Associates
300 Montgomery Street, Suite 1140
San Francisco, CA  94104

Sec Form 10-k

A copy of the Company's annual report to the Securities and Exchange  Commission
on Form 10-K is  available  without  charge  upon  written  request to  Investor
Relations at the Company's headquarters.

SHAREHOLDERS OF RECORD

As of December 31, 1997, the Company had 160
registered shareholders of record of its common stock.

SHAREHOLDER INQUIRIES

Communications concerning transfer requirements,  lost certificates, and changes
of address  should be directed to the Transfer  Agent.  For general  information
about the Company and its  activities,  contact  Investor  Relations  at Company
headquarters.  

INFORMATION  SERVICE 

For timely  information  about  Ostex,  news
releases are available via facsimile on the Company's  News-on-Demand service by
calling     (800)     356-8061     or    on    the    World    Wide    Web    at
http://www.hnt.com/bizwire/cnn/451.htm.

PRICE RANGE OF COMMON STOCK

The  following  table  lists the high and low trading  places for the  Company's
common stock as reported on the Nasdaq National Market System.

         1997                High     Low
         1st quarter       $ 7.88   $ 3.75
         2nd quarter         4.38     1.94
         3rd quarter         4.13     2.25
         4th quarter       $ 4.50   $ 2.13

         1996                High     Low
         1st quarter       $20.00   $12.25
         2nd quarter        16.25     9.13
         3rd quarter        11.50     6.63
         4th quarter       $ 8.75   $ 5.25

The Company's  common stock is traded on the Nasdaq National Market System under
the symbol OSTX. No dividends have been paid on the common stock. 

ANNUAL MEETING

The Annual Meeting of Shareholders will be held Monday, May 18, 1998, at 9:00 am
at the Museum
of History & Industry, Seattle, Washington.

OSTEX WEBSITE

For more information about Ostex, visit us at http://www.ostex.com.


Osteomark  and Ostex are  registered  trademarks  of Ostex  International,  Inc.
Evista  is a  registered  trademark  of Eli  Lilly  and  Company.  Fosamax  is a
registered trademark of Merck & Co., Inc.
Premarin is a  registered  trademark  of  American  Home  Products  Corporation.
Miacalcin is a registered trademark of Sandoz Pharmaceutical Corporation.




Exhibit 23.1

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of our
reports  included  in  this  Form  10-K  into  the  Company's  previously  filed
Registration Statement Nos. 333-4802 and 333-44143.

 
                                 /S/  ARTHUR ANDERSEN LLP

Seattle, Washington
March 26, 1998


<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                           2,201
<SECURITIES>                                    16,764
<RECEIVABLES>                                      755
<ALLOWANCES>                                        25
<INVENTORY>                                        201
<CURRENT-ASSETS>                                20,510
<PP&E>                                           4,678
<DEPRECIATION>                                   1,713
<TOTAL-ASSETS>                                  24,112
<CURRENT-LIABILITIES>                            2,142
<BONDS>                                            326
                                0
                                          0
<COMMON>                                           127
<OTHER-SE>                                      21,517
<TOTAL-LIABILITY-AND-EQUITY>                    24,112
<SALES>                                          3,658
<TOTAL-REVENUES>                                 4,108
<CGS>                                              899
<TOTAL-COSTS>                                      899
<OTHER-EXPENSES>                                12,501
<LOSS-PROVISION>                                    25
<INTEREST-EXPENSE>                                 828
<INCOME-PRETAX>                                (2,264)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (2,264)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (2,264)
<EPS-PRIMARY>                                    (.18)
<EPS-DILUTED>                                    (.18)
        

</TABLE>


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