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 June, 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
-----------------------

    SERONO ANNOUNCES PROMISING RESULTS FOR EMFILERMIN, A NEW DRUG FOR IMPROVING
                             IMPLANTATION OF EMBRYOS

GENEVA,  SWITZERLAND - JUNE 30TH, 2003 - SERONO S.A. (VIRT-X: SEO AND NYSE: SRA)
Serono announced today at the ESHRE (European Society for Human Reproduction and
Embryology)  Congress  in  Madrid  positive  results of a first proof of concept
study  of  emfilermin  (r-hLIF)  for improving embryo implantation in women with
recurrent  implantation  failure  (RIF).

"This study indicates that emfilermin has good prospects of increasing pregnancy
rates  in those women in whom embryos have previously failed to implant, helping
more  couples  to  fulfill  their dream of having a child," said Peter Brinsden,
Medical Director of Bourn Hall in Cambridgeshire, England.  "The results of this
exploratory study confirmed that those patients who had a suspected problem with
purely  embryo  implantation  may  benefit  most  from  emfilermin."

Amongst this group, which is characterized by patients requiring normal in-vitro
fertilization  (IVF)  rather than intra cytoplasmic sperm injection, (ICSI) none
of  the  eight  patients  on placebo achieved a clinical pregnancy compared with
eight  of  the  17  (47%)  treated  with  LIF.

The  results  of this trial were based on a relatively small sample size; Serono
is  undertaking  a  larger  proof  of  concept  study  focusing  on  recurrent
implantation  failure  in  IVF.  This  study  started  this  year  in Europe and
Australia using this protein which was developed by Australian company AMRAD and
has  been  exclusively  licensed  to  Serono.


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FURTHER INFORMATION

1.   One  in six couples worldwide experience some form of infertility problems.

2.   LIF is a substance that is produced in the female reproductive tract and is
     naturally  secreted  by the endometrium during the secretory phase (time of
     embryo  implantation).  There  is good evidence that if LIF is not secreted
     properly  during  the  time of implantation, the embryo may not implant and
     the  pregnancy may fail. Since LIF appears to play an important role during
     embryo  implantation,  it  is  thought that giving recombinant human LIF to
     infertile  women for several days from embryo transfer might increase their
     chances  of  successful  implantation.

3.   The study participants were all pre-menopausal women aged between 21 and 36
     years  who required treatment by IVF or ICSI. All had a history of at least
     three implantation failures, defined as failure of at least three transfers
     of  at least two fresh or frozen/thawed morphologically normal embryos, and
     with  no  other  known  cause  of  previous  IVF  failure.

4.   In  the  overall population from the placebo-controlled study, 11 out of 39
     patients  on  emfilermin (28%) achieved clinical pregnancies. This compared
     with  4  out  of  20  patients  on  placebo  (20%).

5.   Emfilermin  was generally safe and well-tolerated when co-administered with
     paracetamol  administration.  Most adverse events were mild in severity and
     no serious adverse events with possible / probable causal relationship with
     emfilermin were observed. Some mild, asymptomatic, transient and reversible
     laboratory  changes  which  are related to the cytokine-induced acute phase
     response  were  observed.  Most  injection  site  reactions  were  mild  in
     severity.


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ABOUT SERONO

Serono  is  a  global  biotechnology  leader.  The  Company  has six recombinant
products  on the 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). 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.

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 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).

                                       ###

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 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
------------------------


_____________________________________

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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                                   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)



June 30, 2003                By:   /s/ Allan Shaw
                                   ---------------------------------
                                   Name:   Allan Shaw
                                   Title:  Chief Financial Officer