Filed by IGEN International, Inc.
Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under
Rule 14a-12 under the Securities and Exchange Act of 1934

Subject Company: IGEN International, Inc.
Exchange Act File Number of Subject         Company: 000-23252
Registration Statement Number: 333-109196



IGEN International, Inc.
16020 Industrial Drive, Gaithersburg, Maryland 20877 USA
Telephone: (301) 869-9800, Fax: (301) 208-3798


NOT FOR IMMEDIATE RELEASE


CONTACTS:
George Migausky                     Jonathan Fassberg (investors)
IGEN International                  The Trout Group
(301) 869-9800, ext. 2013          (212) 477-9007, ext. 16


Paul Caminiti or Andrew Cole (media)
Citigate Sard Verbinnen
(212) 687-8080


                       IGEN REPORTS SECOND QUARTER RESULTS


GAITHERSBURG, MD, October 30, 2003 - IGEN International, Inc. (Nasdaq: IGEN)
reported today that its revenues for the second quarter ended September 30, 2003
increased to $40.4 million, compared to $13.4 million for the same period last
year. Revenues for the six months ended September 30, 2003 increased to $57.5
million, compared to $25.4 million last year. Revenue growth for the current
periods was due primarily to the $18.6 million court judgment Roche paid to IGEN
in connection with the Maryland contract litigation between the companies, as
well as to increases in product sales and revenue from Roche Diagnostics (Roche
revenue).

Product sales were $6.2 million and $11.6 million during the quarter and
six months ended September 30, 2003, respectively. This represents increases of
31% and 40%, respectively, over the prior year's product sales of $4.7 million
and $8.3 million for the same respective periods. This growth was from sales of
biodefense products for detection of biological agents or toxins and the
M-SERIES(R) family of products for the life science market.

Roche revenue is comprised of all revenues earned by the Company from Roche,
including,

     o    A fixed monthly fee of $5 million for the use of ORIGEN(R) technology.
          The fixed monthly fee commenced in July 2003 and will be payable to
          IGEN until the closing of the proposed acquisition of IGEN by Roche
          Holding, Ltd,

     o    Royalties paid under the 1992 license agreement between the Company
          and Roche for the period through June 30, 2003, which are no longer
          required as a result of a new agreement between the parties that
          provides for fixed monthly payments, as described above,

     o    Fees earned in connection with the Company's performance under an
          assay development contract with Roche.

Roche revenue was $15.3 million and $26.7 million during the quarter and six
months ended September 30, 2003, respectively, compared to $8.4 million and
$16.6 million in the corresponding prior year periods. These increases were
primarily due to the fixed monthly fee earned, which totaled $15 million during
the current quarter, that were greater than royalties earned for all prior
quarters through June 30, 2003.




Royalty and  contract  fees that are  unrelated to Roche for the quarter and six
months ended  September  30, 2003 of $300,000 and $600,000,  respectively,  were
unchanged from  comparable  prior year periods.  These fees relate  primarily to
royalties received in connection with license arrangements for ORIGEN technology
with Eisai and BioMerieux.

Product  costs were $3.5 million and $6.2 million for the quarter and six months
ended  September  30,  2003,  respectively,  compared  to $2.2  million and $3.5
million for the comparable prior year periods. Product costs, as a percentage of
product sales for both the quarter and six month periods, increased due to costs
incurred  in  connection  with the launch of the  M-SERIES  384  instrument  and
upgraded detection modules for life science customers.

Research and development expenses decreased 20% to $5.1 million for the quarter
ended September 30, 2003, and decreased 13% to $10.5 million for the current six
month period due primarily to lower personnel and facilities costs for
development projects. Research and development expenses relate primarily to
ongoing development costs and product enhancements associated with the M-SERIES
family of products, development of new assays for the biodefense, life science
and clinical markets and research and development of new systems and
technologies, including biodefense and clinical point-of-care products.

Selling, general and administrative expenses were $5.9 million and $12.0 million
for the quarter and six months ended September 30, 2003, respectively, which are
decreases of $400,000 (7%) and $200,000 (2%), respectively, from the same prior
year. These decreases were primarily attributable to lower personnel costs in
the current year periods.

Costs related to the Company's litigation and proposed transaction with Roche,
which include financial and legal advisory fees, increased to $4.3 million and
$7.9 million for the quarter and six months ended September 30, 2003,
respectively, compared to $900,000 and $2.0 million for the respective prior
year periods. These increases reflect costs incurred related to the continuing
Roche litigation, patent infringement actions filed by the Company against Roche
in the United States and Europe, and legal fees and related costs associated
with the proposed transaction with Roche.

Costs incurred by the Company for MSD joint venture activities, as recorded in
"Equity in Loss of Affiliate," were $4.5 million and $9.7 million for quarter
and six months ended September 30, 2003, respectively, and were $5.0 million and
$9.5 million in the same respective prior year periods. The changes in Equity in
Loss of Affiliate were due to the varying losses incurred by MSD during the
different periods. These costs are part of the budgets for MSD approved by an
independent committee of IGEN's Board of Directors.

Interest and other expense, net of interest income, was $3.4 million and $4.6
million for the quarter and six months ended September 30, 2003, respectively,
compared to $1.0 million and $1.7 million in the respective prior year's
periods. These increases resulted primarily from a one-time, non-cash interest
charge of approximately $2.4 million related to the unamortized debt discount on
the convertible debentures that were converted in September 2003 into common
stock of the Company.


For the quarter ended September 30, 2003, the Company reported net income of
$13.8 million ($0.57 per basic common share and $0.55 per diluted common share)
compared to a net loss of $8.3 million ($0.35 per basic and diluted common
share) in the same quarter of the prior year. For the six months ended September
30, 2003, the Company reported net income of $6.6 million ($0.28 per basic
common share and $0.26 diluted common share) compared to a net loss of $15.7
million ($0.68 per basic and diluted common share) in the prior year.

As previously  disclosed,  IGEN has reached definitive  agreements with Roche to
resolve its long-running  dispute on the rights to ORIGEN technology.  Under the
terms of the  agreements,  Roche  Holding will acquire  IGEN,  thereby  securing
rights to ORIGEN  technology  used in its  Elecsys(R)  diagnostics  product line
BioVeris  Corporation,  a wholly owned  subsidiary of IGEN, which was previously
called IGEN Integrated  Healthcare,  LLC, is the company that was referred to as
"Newco" in the definitive  agreements relating to the proposed  transaction with
Roche  Holding.  BioVeris  will  assume  IGEN's  biodefense,  life  science  and
industrial  product lines, as well as opportunities in the clinical  diagnostics
and healthcare fields, and will own IGEN's intellectual property,  IGEN's equity
interest in Meso Scale  Diagnostics,  LLC.,  cash and certain  other  rights and
licenses currently held by IGEN. If the proposed  transaction with Roche Holding
is  completed,  IGEN  stockholders  will be entitled to receive  $47.25 in cash,
without interest,  and one share of BioVeris common stock for each share of IGEN
common stock they own.

In connection with the proposed transaction between IGEN and Roche Holding,
BioVeris filed with the Securities and Exchange Commission on September 26,
2003, a registration statement on Form S-4 (Registration Statement No
333-109196) that included the preliminary proxy statement/prospectus relating to
the transaction. Investors and security holders are urged to read the
preliminary proxy statement/prospectus, which is available now, because it
contains important information and also to read the definitive proxy
statement/prospectus, when it becomes available, because it will contain
important information. BioVeris and IGEN will continue to file with the SEC
documents regarding the proposed transaction with Roche Holding, including one
or more amendments to the registration statement on Form S-4. After the
registration statement on Form S-4, as amended, is declared effective by the
SEC, the definitive proxy statement/prospectus will be mailed to IGEN
stockholders in connection with a special meeting of IGEN stockholders to vote
on the proposed transaction and any other matters that might be properly brought
before the meeting. Investors and security holders may obtain a free copy of the
preliminary proxy statement/prospectus and the definitive proxy
statement/prospectus (when it becomes available) and other documents filed by
BioVeris and IGEN with the SEC at the SEC's web site at www.sec.gov. The
definitive proxy statement/prospectus (when it becomes available) and these
other documents may also be obtained for free from IGEN by directing a request
to IGEN International, Inc., 16020 Industrial Drive, Gaithersburg, MD 20877,
(301) 869-9800, Attention: Secretary.

IGEN develops and markets biological detection systems based on its proprietary
ORIGEN technology, which provides a unique combination of sensitivity,
reliability, speed and flexibility. ORIGEN-based systems are used in a wide
variety of applications, including clinical diagnostics, pharmaceutical research
and development, life science research, biodefense testing and testing for food
safety and quality control. These systems are marketed by IGEN and its licensees
and/or




distributors. IGEN, M-SERIES and ORIGEN are registered trademarks of IGEN
International, Inc. More information about the company can be found at
http://www.igen.com

This release contains forward-looking statements within the meaning of the "safe
harbor" provision of the Private Securities Litigation Reform Act of 1995. All
statements that are not statements of historical fact are forward-looking
statements. The words "may," "should," "will," "expect," "could," "anticipate,"
"believe," "estimate," "plan," "intend" and similar expressions have been used
to identify certain of the forward-looking statements in this release. These
forward-looking statements are based on management's current expectations,
estimates and projections and are subject to a number of risks, uncertainties
and assumptions that could cause actual results to differ materially from those
described in the forward-looking statements. The forward-looking statements
contained in this release include statements about revenue growth, market
acceptance of new products, business operations, trends and changes in financial
or operating performance, technology or product plans and the proposed
transaction with Roche Holding. These statements are not guarantees of future
performance, involve certain risks, uncertainties, and assumptions that are
difficult to predict, and are based upon assumptions as to future events that
may not prove accurate. Therefore, actual outcomes and results may differ
materially from what is expressed herein.

In any forward-looking statement in which IGEN expresses an expectation or
belief as to future results, such expectation or belief is expressed in good
faith and believed to have a reasonable basis, but there can be no assurance
that the statement or expectation or belief will result or be achieved or
accomplished. The following factors, among others, could cause actual results to
differ materially from those described in the forward-looking statements: the
failure of IGEN stockholders to approve the proposed merger with Roche Holding;
the value of the proposed transaction with Roche Holding to IGEN stockholders;
the inability to satisfy the conditions for the completion of the proposed
transaction with Roche Holding; the timing of the closing for the proposed
transaction with Roche Holding; costs relating to the proposed transaction with
Roche Holding; IGEN's relationship with Roche Holding; IGEN's ability to renew
certain ongoing patent litigation if the proposed transaction with Roche Holding
is not completed; domestic and foreign governmental and public policy changes,
particularly related to healthcare costs, that may affect new investments and
purchases made by customers; availability of financing and financial resources
in the amounts, at the times and on the terms required to support IGEN's future
business; protection and validity of patent and other intellectual property
rights; and changes in general economic, business and industry conditions
affecting IGEN's business generally. These and other risk factors are discussed
in IGEN's annual report on Form 10-K for the year ended March 31, 2003, and
BioVeris's registration statement on Form S-4, each filed with the SEC and
available at the Investor Relations section of IGEN's web site at www.igen.com
or the SEC's web site at www.sec.gov. IGEN and BioVeris disclaim any intent or
obligation to update any forward looking statements.


                            (Financial data follows.)





                            IGEN International, Inc.
                      Consolidated Statements of Operations
                      (In thousands, except per share data)
                                   (Unaudited)





                                                                      Three months ended                Six months ended
                                                                         September 30,                    September 30,
                                                                         2003        2002               2003        2002
                                                                         ----        ----               ----        ----
REVENUES:
                                                                                                    
Roche revenue                                                        $ 15,310    $  8,407           $ 26,680    $ 16,572
Product sales                                                           6,152       4,698             11,571       8,290
Royalties and contract fees                                               333         320                610         562
Roche litigation judgment                                              18,600           -             18,600           -
                                                                     --------    --------           --------    --------
Total                                                                $ 40,395      13,425             57,461      25,424
                                                                     --------    --------           --------    --------

OPERATING COSTS AND EXPENSES:
Product costs                                                           3,512       2,213              6,155       3,545
Research and development                                                5,060       6,339             10,536      12,107
Selling, general and administrative                                     5,892       6,319             12,005      12,253
Roche litigation and merger costs                                       4,265         885              7,864       2,026
                                                                     --------    --------           --------    --------
Total                                                                  18,729      15,756             36,560      29,931
                                                                     --------    --------           --------    --------

INCOME (LOSS) FROM OPERATIONS                                          21,666      (2,331)            20,901      (4,507)
                                                                     --------    --------           --------    --------

OTHER (EXPENSE) INCOME:
Interest expense from debenture conversion                             (2,365)          -             (2,365)          -
Other interest expense                                                 (1,170)     (1,444)            (2,491)     (2,861)
Other income, net                                                         132         465                219       1,119
                                                                     --------    --------           --------    --------
Total                                                                  (3,403)       (979)            (4,637)     (1,742)

EQUITY IN LOSS OF AFFILIATE                                            (4,450)     (5,032)            (9,680)     (9,455)
                                                                     --------    --------           --------    --------

NET INCOME (LOSS)                                                      13,813      (8,342)             6,584     (15,704)

PREFERRED DIVIDENDS                                                         -          (3)                 -        (201)
                                                                     --------    --------           --------    --------

NET INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS                $ 13,813    $ (8,345)          $  6,584    $(15,905)
                                                                     ========    ========           ========    ========

NET INCOME (LOSS) PER COMMON SHARE-BASIC                             $   0.57    $  (0.35)          $   0.28    $  (0.68)
                                                                     ========    ========           ========    ========
NET INCOME (LOSS) PER COMMON SHARE-DILUTED                           $   0.55    $  (0.35)          $   0.26    $  (0.68)
                                                                     ========    ========           ========    ========

WEIGHTED AVERAGE COMMON SHARES OUTSTANDING-BASIC                       24,044      23,717             23,903      23,373
                                                                     ========    ========           ========    ========
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING-DILUTED                     25,133      23,717             24,883      23,373
                                                                     ========    ========           ========    ========






                            IGEN International, Inc.
                     Summary Consolidated Balance Sheet Data
                                 (In thousands)



                                               September 30,        March 31,
                                                   2003               2003
                                                (Unaudited)
                                                -----------        ---------
Assets:
                                                              
Cash and short-term investments                  $49,840            $34,245
Other current assets                              13,643             22,799
Capital and noncurrent assets                     21,191             18,222
                                                 -------            -------
Total                                            $84,674            $75,266
                                                 =======            =======
Liabilities and stockholders' equity:
Current liabilities                              $28,820            $18,089
Noncurrent liabilities                                26             44,436
Stockholders' equity                              55,828             12,741
                                                 -------            -------
Total                                            $84,674            $75,266
                                                 =======            =======