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 October, 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-______)



                                                                          SERONO


Media Release

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


               FDA APPROVES SERONO'S OVIDREL(R) PREFILLED SYRINGE
                          FOR TREATMENT OF INFERTILITY

   OVIDREL(R) PREFILLED SYRINGE IS THE FIRST READY-TO-INJECT LIQUID INFERTILITY
                          TREATMENT APPROVED BY THE FDA

ROCKLAND,  MA,  OCTOBER  8, 2003 - Serono, Inc., the US affiliate of Serono S.A.
(virt-x:  SEO  and  NYSE:  SRA), announced today that the United States Food and
Drug Administration (FDA) has approved its new pre-filled syringe for Ovidrel(R)
(choriogonadotropin alfa injection), making it the first liquid, ready-to-inject
therapy  for  infertility  treatment  in  the  US.

Designed  to  make infertility treatment easier for patients, the new Ovidrel(R)
Pre-Filled  Syringe is the only liquid infertility treatment approved by the FDA
that  patients  can  administer  in  one  single step.  Unlike other infertility
treatments,  the  Ovidrel(R)  PreFilled Syringe does not require patients to mix
medication prior to injection. It is also the only available recombinant version
of  human  chorionic gonadotropin (hCG), one of three hormones required to treat
infertility.  Essentially  equivalent  in  structure to naturally occurring hCG,
Ovidrel(R)  triggers  ovulation  in  women  being  treated  for  infertility.

"The administration of the hormone medication needed to trigger ovulation is one
of  the  most crucial steps in the infertility treatment cycle," said Raymond W.
Ke,  MD,  Associate  Professor of Obstetrics and Gynecology at the University of
Tennessee  and  Director  of IVF for Fertility Associates of Memphis, Tennessee.
"Having  Ovidrel(R)  in  a  pre-filled  syringe  will  make that step easier for
patients and may alleviate some of the difficulties and stresses associated with
infertility  treatment."

The  new  pre-filled  syringe  for  Ovidrel(R)  will  continue to carry the same
indication  as  the currently marketed product for triggering ovulation in women
undergoing  infertility  treatment.

"We  are  very  pleased  that  the  FDA  has  approved  the Ovidrel(R) PreFilled
Syringe,"  said  Bharat  Tewarie,  MD,  Executive  Vice  President, Reproductive
Health,  Serono,  Inc.  "We  are committed to advancing infertility treatment by
developing  safe,  effective  and  patient-friendly  products manufactured using
state-of-the-art  technology."


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Serono  expects  Ovidrel(R)  PreFilled  Syringe  to  be  available  in November,
replacing  the  currently  available  powder  form  of  Ovidrel(R).

ADDITIONAL  PRODUCT  INFORMATION
Ovidrel(R)  is  one  of  a complete line of widely prescribed Serono infertility
therapies  used  to promote follicle growth, ovulation and maturation of eggs in
the  ovaries  of women undergoing assisted reproductive technologies (ART), such
as in vitro fertilization, and to induce ovulation in women with infertility due
to  anovulation.

Ovidrel(R)  PreFilled  Syringe  is  well  tolerated.  Side  effects  may include
injection  site  bruising, pain or inflammation, tiredness, nausea, headache and
abdominal  pain.  With  all  assisted  reproduction  there  is a risk of ovarian
hyperstimulation  syndrome,  multiple  pregnancy  or  miscarriage.

Infertility  is  defined as the inability of a couple to achieve pregnancy after
one  year  of  regular, unprotected intercourse (six months if the woman is over
35).  It  affects  about 6.1 million Americans, representing about 10 percent of
couples  in  their  childbearing  years.  Infertility  is  just  as likely to be
related  to male factors as female factors, which each account for about a third
of  infertility  problems.  The remaining third are either a combination of male
and  female  factors  or  are  unexplained.

SERONO  AND  INFERTILITY  TREATMENT
Serono,  the  world  leader  in  reproductive  health, is dedicated to providing
patient-friendly,  innovative products to help couples build families. Serono is
the only company to offer a full portfolio of fertility drugs for every stage of
the  reproductive cycle and recombinant versions of the three hormones needed to
treat infertility: Gonal-f(R) (follitropin alfa for injection), to stimulate the
ovaries and produce eggs; Luveris(R) (lutropin alfa for injection), to stimulate
follicular  development  in  women who are profoundly LH deficient; Cetrotide(R)
(cetrorelix  acetate  for  injection)  to  control  hormonal  surges; Ovidrel(R)
(choriogonadotropin  alfa  for  injection), to help follicles mature and release
eggs;  and  Crinone(R)  (progesterone  gel),  to  help  establish and maintain a
pregnancy.  (Luveris(R)  is  not  approved  in  the  US.)

For  more  information  on  infertility  and  full  prescribing  information for
Serono's  US  marketed  fertility  products  visit  www.seronofertility.com.
                                                    -----------------------


ABOUT  SERONO
Serono,  Inc.,  located in Rockland, MA, is the US affiliate of Serono, a global
biotechnology  leader. The Company has six recombinant products on the worldwide
market, Gonal-F(R) (follitropin alfa for injection), Luveris(R) (lutropin alfa),
Ovidrel(R)/Ovitrelle(R)  (choriogonadotropin  alfa  for  injection),  Rebif(R)
(interferon  beta-1a),  Serostim(R) [somatropin (rDNA origin) for injection] and
Saizen(R)  [somatropin (rDNA origin) for injection]. (Luveris(R) is not approved
in  the  USA.)(1)  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

--------------------------
(1)  Package  inserts  for  Serono's  US  marketed  products  are  available  at
www.seronousa.com  or  by  calling  1-888-275-7376.
-----------------


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these businesses and on establishing new therapeutic areas. Currently, there are
over  30  projects  in  development.

Serono  was  awarded the International James D. Watson 2003 Helix Award from the
Biotechnology  Industry  Organization  (BIO)  in  recognition  of  the Company's
outstanding  leadership  and  highest  standards  of  scientific  and  product
achievement.

In  2002, Serono achieved worldwide revenues of $1.546 billion, and a net income
of  $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).

                                       ###

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 April 17, 2003.  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, 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
  ------------------------

  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


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                                   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)



October 8, 2003                    By:    /s/ Allan Shaw
                                          ----------------------------
                                   Name:  Allan Shaw
                                   Title: Chief Financial Officer