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 March, 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 RECEIVES FDA APPROVAL FOR NEW PRESENTATIONS OF GONAL-F(R) TO TREAT
                                   INFERTILITY

     NEW PRESENTATIONS ALLOW FOR MAXIMUM DOSING FLEXIBILITY AND EASE OF USE

ROCKLAND,  MA,  MARCH  29,  2003 - SERONO (VIRT-X:  SEO AND NYSE:  SRA) -Serono,
Inc.,  the  US  affiliate  of  Serono, announced today that the US Food and Drug
Administration  (FDA)  has approved new presentations of Gonal-f(R) (follitropin
alfa  for  injection)  including  a 450 IU multi-dose vial and a 75 IU mono-dose
vial.  Serono  is  the leader in reproductive health, and Gonal-f(R) is the most
prescribed  gonadotropin  in  the  world.

The  new  presentations  of  Gonal-f(R) expand Serono's portfolio of infertility
treatments  to  allow  for  maximum dosing flexibility and ease of use.  "We are
very  pleased  with  the  approval of the new presentations of Gonal-f(R)," said
Bharat  Tewarie, MD, Executive Vice President, Reproductive Health, Serono, Inc.
"We  believe  these  products  will  provide  our  customers  with  the  optimal
flexibility they require to tailor treatment to individual patient needs and all
treatment  protocols."

The  new  450  IU multi-dose vial will be available in addition to the currently
marketed  multi-dose  presentation,  while  the  new  75  IU mono-dose vial will
replace the current ampules.  Gonal-f(R) is indicated for induction of ovulation
and  pregnancy  as part of hormonal treatment for infertility and development of
multiple  follicles  as  part  of  an  assisted reproductive technology program.
Serono  expects  the  new Gonal-f(R) presentations to be introduced in the US in
Q2.

Gonal-f(R) is a highly consistent recombinant human follicle stimulating hormone
(r-hFSH)  prescribed  to  supplement  or  replace naturally occurring FSH, which
stimulates  the  development  of  follicles  in the ovaries.  It is the only FSH
available  in  multi-dose and mono-dose vials for maximum dosing flexibility and
individualized  treatment.

Infertility  is  defined as the inability 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,  which  represents  about 10 percent of
couples  in  their  childbearing  years.  About  70% of patients who are treated
succeed  in  having  children.


                                    - more -

ADDITIONAL  INFORMATION
Side  effects  may  occur with the use of infertility drugs and, therefore, they
should  only  be  prescribed  by  physicians  who  are  thoroughly familiar with
infertility  problems  and  their management.  Ovarian hyperstimulation syndrome
(OHSS)  with or without vascular and pulmonary complications, can occur with the
use  of infertility drugs.  Reports of multiple births have been associated with
Gonal-f(R)  treatment.  Side  effects  in  women  using Gonal-f(R) for ovulation
induction  may  include  headache,  ovarian  cysts  and  nausea.

ABOUT  SERONO,  INC.  AND  INFERTILITY
Serono,  Inc. is dedicated to providing patient-friendly, innovative products to
help  couples  build families.  It is the only company to offer a full portfolio
of  fertility  drugs  for  every stage of the reproductive cycle and recombinant
versions  of  two  hormones  needed  to  treat  infertility.

ABOUT  SERONO
Serono,  Inc.,  located in Rockland, MA, is the US affiliate of Serono, a global
biotechnology  leader,  headquartered  in  Geneva, Switzerland. Serono has seven
recombinant  products,  Rebif(R)  (interferon  beta-1a), Gonal-F(R) (follitropin
alfa  for  injection),  Luveris(R)  (lutropin  alfa),  Ovidrel(R)/Ovitrelle(R)
(choriogonadotropin  alfa  injection), Serostim(R) [somatropin (rDNA origin) for
injection],  Saizen(R) [somatropin (rDNA origin) for injection] and Zorbtive(TM)
[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. Serono'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).

                                       ###

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.

                                       ###

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



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



                                   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)


March 29, 2004                     By:    /s/ Allan Shaw
                                          -----------------------
                                   Name:  Allan Shaw
                                   Title: Chief Financial Officer