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, 2004

                                   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 LAUNCHES RAPTIVA(R) AS THE FIRST BIOLOGICAL TREATMENT FOR PSORIASIS
                         LAUNCHED IN THE EUROPEAN UNION

   "Germany takes the lead in psoriasis treatment," says leading dermatologist

MUNCHEN,  DEUTSCHLAND  -  OCTOBER  5, 2004 - Serono announced today that it has
launched  Raptiva(R)  (efalizumab)  in  Germany,  making it the first biological
treatment for moderate-to-severe chronic plaque psoriasis in the European Union.

Raptiva,  which  can  be self-injected by patients just once-weekly, selectively
targets  the  T-cells;  that  are now known to be involved in the development of
psoriasis  symptoms.  Many experts believe this to be a major advance on current
treatments.  Many of these current treatments have limiting side effects, can be
inconvenient  and  difficult  for  patients  to  comply  with.

According  to  Prof.  Jorg  Prinz,  Clinic  of  Dermatology,  Venereology  and
Allergology  at  the University of Munich, new treatments will "give people with
psoriasis  exciting  new  hope  for  the  future."

"Based  on  current  knowledge  biological  treatments  such as Raptiva(R) offer
psoriasis  patients  improved  therapies  that will be easier to manage and will
provide  effective  and  safe,  long-term control of their condition," he added.

This  view  was  supported  by  Horst  von Zitzewitz, President of the Deutscher
Psoriasis  Bund,  Germany's  leading Psoriasis Association* "We have long sought
better  treatments  which  have  a  favorable  safety  profile and can easily be
integrated into a patient's life," he said. "Now with biological treatments like
Raptiva  we  will  have  a treatment option which will give long-term sufferers,
especially  those  who  cannot be satisfied with current treatments, a chance to
live  a  more  normal  life."

Serono has set up a free call number for patients wanting to know more about the
disease  and  its treatment on 0800 7278482 (0800 RAPTIVA), as well as a website
at  www.psoriasis-konkret.de.  Serono  will launch throughout the European Union
    ------------------------
by  the  end  of  2005.


*  (For  more  information  you  can  visit  the  psoriasis-homepage:
www.psoriasis-bund.de)
----------------------


                                                                             1/3

ABOUT  RAPTIVA(R)
Raptiva(R)  is  a  humanized  therapeutic  antibody  designed to selectively and
reversibly  block  the  activation, reactivation and trafficking of T-cells that
lead  to  the  development  of  psoriasis  symptoms.  Raptiva  is designed to be
administered once weekly via subcutaneous injection and can be self-administered
by  patients  at  home  after  training  by  a  healthcare  professional.

Raptiva  received EU approval for the 'Treatment of adult patients with moderate
to  severe chronic plaque psoriasis who have failed to respond to, or who have a
contraindication  to,  or  are  intolerant to other systemic therapies including
cyclosporine,  methotrexate  and  PUVA'.

Serono  has  already  launched  Raptiva(R)  in  Switzerland  and  Argentina, has
recently received approval in Mexico, Brazil and Australia.  Raptiva(R) has also
been  available  since  November  2003  in  the  U.S.,  where  it is marketed by
Genentech  for  the  treatment of moderate to severe chronic plaque psoriasis in
adults aged 18 or older who are candidates for systemic therapy or phototherapy.

Serono  has  the  rights  to develop and market Raptiva worldwide outside of the
United  States  and Japan. Development and marketing rights in the United States
remain  with Genentech Inc. (NYSE:DNA) and its U.S. partner XOMA (Nasdaq: XOMA).

More  than  3,500  patients in the U.S. and Europe have been included in Raptiva
trials  to  date, creating the largest existing database of patients taking part
in  studies  with  a  biological  therapy for psoriasis, with about 200 of these
treated  continuously  for  more  than  2-and-a-half  years.

Adverse  events  observed  with Raptiva include headache, non-specific infection
(e.g.,  common colds), chills, pain, nausea, asthenia (weakness), and fever, all
of which diminished after the first 1-2 doses. Further, there was no evidence of
accumulation  or  cumulative  toxicity.  At 30-months, the occurrence of serious
adverse  events  was  infrequent  which  is  consistent  with data from previous
Raptiva  Phase  III  studies.

ABOUT  PSORIASIS
Psoriasis  is  a  T-cell  mediated  disease  which  occurs  when skin cells grow
abnormally,  resulting in thick, red, scaly, inflamed patches. Plaque psoriasis,
the most common form of the disease is characterized by inflamed patches of skin
("lesions")  topped with silvery white scales. Psoriasis can be limited to a few
spots  or  involve  extensive  areas of the body, appearing most commonly on the
scalp,  knees, elbows and trunk. Although it is highly visible, psoriasis is not
a  contagious  disease.  While  there  are a number of medications that may help
control  the  symptoms  of  psoriasis,  there  currently  is  no  known  cure.

BACKGROUND  MATERIAL
For  free  B-roll,  video and other content about Raptiva, psoriasis and Serono,
please  visit  the  Serono  Media  Center  www.thenewsmarket.com/Serono. You can
                                           ----------------------------
download  print-quality images and receive broadcast-standard video digitally or
by  tape  from  this  site.  Registration  and  video  is  free  to  the  media.

ABOUT  SERONO
Serono  is  a  global  biotechnology leader. The Company has eight biotechnology
products,  Rebif(R),  Gonal-F(R),  Luveris(R),  Ovidrel(R)/Ovitrelle(R),
Serostim(R),  Saizen(R), Zorbtive(TM) and Raptiva(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 and has
recently entered the psoriasis area. The Company's research programs are focused
on  growing  these  businesses  and  on  establishing  new  therapeutic  areas.
Currently,  there  are  approximately  30  ongoing  development  projects.

In  2003,  Serono  achieved  worldwide revenues of US$2,018.6 million, and a net
income  of  US$390.0 million, making it the third largest biotech company in the
world. Its products are sold in over 90 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).

                                       ***


                                                                             2/3

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 March 25, 2004. 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:
CORPORATE MEDIA RELATIONS:  CORPORATE 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
www.serono.com              Reuters: SEO.VX / SRA.N
--------------------------
                            Bloomberg: SEO VX / SRA US
                            INVESTOR RELATIONS, USA
                            Tel:  +1 781 681 2552
                            Fax:  +1 781 681 2912


                                                                             3/3

                                   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 5, 2004                         By:    /s/ Francois Naef
                                               ------------------------------
                                        Name:  Francois Naef
                                        Title: Secretary