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 December, 2002

                                  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-      )
                                                 ------



SERONO                                                                     AMGEN


Media  Release

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

                    SERONO AND AMGEN CLOSE AGREEMENT FOR U.S.
                        COMMERCIALIZATION OF NOVANTRONE

THOUSAND OAKS, CALIFORNIA, USA AND GENEVA, SWITZERLAND - DECEMBER 18, 2002

Amgen  Inc.  (NASDAQ:AMGN) and Serono S.A. (virt-x: SEO and NYSE: SRA) announced
today  that they have completed their license and commercialization agreement by
which  Serono  will  sell  the marketed multiple sclerosis (MS) and chemotherapy
drug  Novantrone(R)  (mitoxantrone  for  injection  concentrate)  in  the United
States.

The  closing  of this deal was completed after the U.S. Federal Trade Commission
granted  early  termination  of  the  waiting  period  required  by  the
Hart-Scott-Rodino  Act.

Novantrone  is  approved  by  the U.S. Food and Drug Administration (FDA) in the
United  States  for  secondary  (chronic) progressive, progressive relapsing and
worsening  relapsing-remitting MS, as well as for certain forms of cancer. It is
a  topoisomerase  II  inhibitor  which  acts  by  inhibiting  DNA replication in
dividing  cells.

Novantrone  was  acquired  by  Amgen  in  connection with Amgen's acquisition of
Immunex  Corporation  in  July,  2002.  The  drug was approved by the FDA for MS
indications  in  October,  2000, and has also been approved for certain oncology
indications  since  1987.

Full  prescribing  information  for  Novantrone  can  be  obtained  by  visiting
www.novantrone.com.
------------------

Amgen  is  a global biotechnology company that discovers, develops, manufactures
and  markets  important  human  therapeutics  based  on advances in cellular and
molecular  biology. Serono is a global biotechnology leader with 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).

                                     -more-



This  news  release contains forward-looking statements that involve significant
risks  and  uncertainties,  including  those  discussed  below  and  more  fully
described  in  the  Securities  and  Exchange Commission reports filed by Amgen,
including  its  most  recent  Form  10-Q.  Amgen  conducts  research  in  the
biotechnology/pharmaceutical  field  where  movement  from concept to product is
uncertain;  consequently,  there can be no guarantee that any particular product
candidate  will  be  successful  and  become a commercial product.  Furthermore,
Amgen's  research,  testing, pricing, marketing and other operations are subject
to  extensive  regulation  by  domestic  and  foreign  government  regulatory
authorities.  In  addition,  sales  of  Amgen's  products  are  affected  by
reimbursement  policies  imposed  by  third party payors, including governments,
private insurance plans and managed care providers. These government regulations
and  reimbursement  policies  may  affect  the development, usage and pricing of
Amgen's  products.  In  addition,  while Amgen routinely obtains patents for its
products  and  technology,  the protection offered by Amgen's patents and patent
applications  may be challenged, invalidated or circumvented by its competitors.
Because  forward-looking  statements  involve  risks  and  uncertainties, actual
results  may  differ materially from current results expected by Amgen. Amgen is
providing  this  information as of December 18, 2002 and expressly disclaims any
duty  to  update  information  contained  in  this  press  release.


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.

CONTACT:

     Amgen Inc.
     Jeff Richardson, 805.447.3227 (media)
     Cary Rosansky, 805.447.4634  (investors)
     www.amgen.com

     Serono International S.A.
     USA: 781.681.23 40 (media)
     Europe: 41-22-739 36 00  (media)
             41-22-739 36 01  (investor relations)
     www.serono.com
     --------------


EDITOR'S  NOTE:  An  electronic version of this news release may be accessed via
our  web  site  at  www.amgen.com. Visit the Corporate Center and click on Amgen
                    -------------
News.  Journalists  and  media  representative  may  sign up to receive all news
releases  electronically at the time of announcement by filling out a short form
in  the  Amgen  News  section  of  the  site.

                                      -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)



December 19, 2002                          By:   /s/ Jacques Theurillat
                                                 -------------------------------
                                           Name:  Jacques Theurillat
                                           Title: Deputy Chief Executive Officer