SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    --------

                                    FORM 6-K

                        REPORT OF FOREIGN PRIVATE ISSUER
                      PURSUANT TO RULE 13A-16 OR 15D-16 OF
                      THE SECURITIES EXCHANGE ACT OF 1934

                        For the month of February, 2003

                                  Serono S.A.
                              -------------------
                              (Registrant's Name)

                            15 bis, Chemin des Mines
                                Case Postale 54
                                CH-1211 Geneva 20
                                  Switzerland
                    ----------------------------------------
                    (Address of Principal Executive Offices)

                                    1-15096
                              ---------------------
                              (Commission File No.)

     (Indicate by check mark whether the registrant files or will file annual
reports under cover of Form 20-F or Form 40-F.)

     Form 20-F  X     Form 40-F
               ----             ----

     (Indicate by check mark if the registrant is submitting the Form 6-K in
paper as permitted by Regulation S-T Rule 101 (b)(1).)
                                                        ----

     (Indicate by check mark if the registrant is submitting the Form 6-K in
paper as permitted by Regulation S-T Rule 101 (b)(7).)
                                                        ----

     (Indicate by check mark whether the registrant by furnishing the
information contained in this form is also thereby furnishing the information to
the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of
1934.)

     Yes       No   X
         ----      ----

     (If "Yes" is marked, indicate below the file number assigned to the
registrant in connection with Rule 12g3-2(b): 82-      )
                                                 ------



                                                               [GRAPHIC OMITTED]
                                                                          SERONO

Media Release


FOR IMMEDIATE RELEASE
---------------------


 SERONO AND GENENTECH EXPAND RAPTIVA AGREEMENT TO ADDITIONAL EMERGING MARKETS IN
                                      ASIA

GENEVA, SWITZERLAND - FEBRUARY 6, 2003 - SERONO S.A. (VIRT-X: SEO AND NYSE: SRA)
Serono  announced  today  that  Genentech  Inc. (NYSE:DNA) has extended Serono's
exclusive  license  to develop and market Raptiva(TM) (efalizumab) to include an
additional  15  Asian  countries. This expands the scope of the Genentech-Serono
collaboration  for  Raptiva(TM),  which  was  first  established in August 2002.

"The  extension  of  our  territory  under  this  important  license  agreement
highlights Serono's considerable presence in Asia and will enable us to bring an
innovative new therapy to patients with psoriasis in  a region with great growth
potential,"  said  Ernesto  Bertarelli,  Chief  Executive  Officer  of  Serono.

The 15 countries included in the extended agreement are China, S. Korea, Taiwan,
Hong  Kong,  Singapore, Malaysia, Thailand, the Philippines, Indonesia, Vietnam,
Cambodia,  Laos,  Nepal,  Myanmar  and  Brunei.

As a result of the new agreement, Serono will now develop and market Raptiva(TM)
worldwide  outside  of  the  United  States and Japan. Development and marketing
rights  in  the  United  States  remain with Genentech and its U.S. partner XOMA
(Nasdaq:  XOMA).  Genentech  retains  exclusive  marketing  rights  in  Japan.

Serono  plans  to  file  for  approval  of  Raptiva(TM)  for  moderate to severe
psoriasis  in  Europe  in  the  first  quarter  of  this year and in most of the
countries  included in this new agreement in the first half of 2004.   Genentech
and XOMA announced submission of a Biologics License application for Raptiva(TM)
to  the  U.S.  Food  and  Drug  Administration  on  December  23,  2002.

Financial  terms  of  the  agreement  were  not  disclosed.  Raptiva(TM)  is  a
recombinant  humanized monoclonal antibody under evaluation for the treatment of
moderate-to-severe  plaque  psoriasis  and  is  in phase 2 trials for rheumatoid
arthritis.


                                     -more-


ABOUT SERONO

Serono  is  a  global  biotechnology  leader.  The  Company  has six recombinant
products  on  the  market,  Gonal-F(R),  Luveris(R),  Ovidrel(R)/Ovitrelle(R),
Rebif(R),  Serostim(R) and Saizen(R) (Luveris(R) is not approved in the USA). In
addition  to  being  the  world leader in reproductive health, Serono has strong
market  positions  in  neurology,  metabolism and growth. The Company's research
programs  are  focused  on  growing  these  businesses  and  on establishing new
therapeutic  areas.  Currently,  there  are  over  30  projects  in development.

In  2002,  Serono  achieved  worldwide  revenues  of US$1.546 billion, and a net
income  of  US$321  million,  making it the third largest biotech company in the
world.  The  Company operates in 45 countries, and its products are sold in over
100  countries. Bearer shares of Serono S.A., the holding company, are traded on
the  virt-x  (SEO) and its American Depositary Shares are traded on the New York
Stock  Exchange  (SRA).


ABOUT RAPTIVA(TM)

Raptiva(TM)  is  designed to inhibit the adhesion of T-lymphocytes to other cell
types by inhibiting the binding of LFA-1 to ICAM-1. This mechanism of action has
a  number of effects depending upon the cell type, which include: (1) inhibition
of  T-lymphocyte  interactions  with  tissue-specific  cells,  (2) inhibition of
T-lymphocyte migration, (3) inhibition of T-lymphocyte activation, proliferation
and  cytokine  release.  In  the  Phase  III studies, Raptiva(TM) was given as a
once-a-week  subcutaneous  injection.

                                       ###
Some  of  the  statements  in  this  press  release  are  forward  looking. Such
statements  are inherently subject to known and unknown risks, uncertainties and
other  factors  that  may  cause  actual results, performance or achievements of
Serono  S.A.  and  affiliates  to be materially different from those expected or
anticipated  in  the  forward-looking statements. Forward-looking statements are
based on Serono's current expectations and assumptions, which may be affected by
a  number  of  factors, including those discussed in this press release and more
fully  described  in  Serono's  Annual  Report  on Form 20-F filed with the U.S.
Securities  and  Exchange  Commission on May 21 2002.  These factors include any
failure  or  delay  in  Serono's ability to develop new products, any failure to
receive  anticipated  regulatory  approvals,  any  problems  in  commercializing
current  products  as  a  result of competition or other factors, our ability to
obtain  reimbursement  coverage  for  our  products,  and government regulations
limiting  our  ability  to  sell  our  products. Serono has no responsibility to
update the forward-looking statements contained in this press release to reflect
events  or  circumstances  occurring  after  the  date  of  this  press release.
                                       ###

FOR MORE INFORMATION, PLEASE CONTACT:

SERONO IN GENEVA, SWITZERLAND:
MEDIA RELATIONS:              INVESTOR RELATIONS:
Tel:  +41-22-739 36 00        Tel:     +41-22-739 36 01
Fax:  +41-22-739 30 85        Fax:     +41-22-739 30 22
http://www.serono.com         Reuters:  SEOZ.VX / SRA.N
---------------------         Bloomberg: SEO VX / SRA US

SERONO, INC., ROCKLAND, MA
MEDIA RELATIONS:              INVESTOR RELATIONS:
Tel.  +1 781 681 2340         Tel. +1 781 681 2552
Fax:  +1 781 681 2935         Fax: +1 781 681 2912
http://www.seronousa.com
------------------------


GENENTECH:

MEDIA CONTACT:

Tara Cooper:  +1 (650) 225-5505

INVESTOR CONTACT:

Kathee Littrell:   +1 (650) 225-1034

www.gene.com
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                                      -end-


                                   SIGNATURES

     Pursuant to the requirements 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.



                                              SERONO S.A.
                                              a Swiss corporation
                                              (Registrant)



February 6, 2003                       By:    /s/ Allan Shaw
                                              ---------------------------
                                              Name:   Allan Shaw
                                              Title:  Chief Financial Officer