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 January, 2005

                                  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 THE AVAILABILITY OF SAIZEN(R) FOR ADULT GROWTH HORMONE
                     DEFICIENCY (AGHD) IN THE UNITED STATES

    NEEDLE-FREE DELIVERY OPTION EXCLUSIVE TO SAIZEN(R) AVAILABLE FOR PATIENTS


GENEVA,  SWITZERLAND  AND  ROCKLAND,  MA, JANUARY 10, 2005 - Serono Inc., the US
affiliate  of  Serono  (virt-x:  SEO  and  NYSE:  SRA),  announced  today  the
availability  of  Saizen(R)  [somatropin (rDNA origin) for injection] for use in
the treatment of patients with adult growth hormone deficiency (AGHD), following
its  FDA  approval.

"This  new  indication  for  Saizen(R)  represents  the  evolution of our growth
hormone  portfolio  and  further  demonstrates  our  commitment to the metabolic
franchise,"  said  James  Sapirstein,  executive  vice  president  of  Metabolic
Endocrinology at Serono, Inc. "Patients with AGHD who are treated with Saizen(R)
therapy  can  use our easy-to-use drug delivery devices such as cool.click(R), a
needle-free  device that is preferred by pediatric patients and is now available
for use by adults taking Saizen(R)."

Adult  Growth  Hormone  Deficiency  (AGHD)  can  be  effectively  treated  with
Saizen(R).  With  the  U.S. approval, patients who were growth hormone deficient
during childhood and have growth hormone deficiency as an adult, may continue to
use  Saizen(R).  In addition, adult patients who have adult onset growth hormone
deficiency  either  alone, or associated with multiple hormone deficiencies, now
have access to Saizen(R) and its line of devices.

Saizen(R)  can  be  administered  using a needle-free device, cool.click(R), the
only  FDA  approved needle-free device for the administration of growth hormone.
It  can  also  be administered with a recently launched autoinjector pen device,
one.click(R),  or  by  traditional  needle  and  syringe.  Serono's portfolio of
innovative  devices  gives  patients  the  choice  they  want  in growth hormone
delivery.

Patients  can  learn  more  about Saizen(R) and Serono's growth hormone delivery
devices  by  talking  with their physician, or by calling Serono Connections for
Growth(R)  toll-free  at  1-800-582-7989.  The  full prescribing information for
Saizen(R) can be found online at www.seronousa.com.
                                 -----------------



About Adult Growth Hormone Deficiency (AGHD)

Growth  hormone  deficiency  can be a significant problem for adults even though
they  no  longer  get taller. AGHD is recognized as a specific clinical syndrome
with  numerous  physiological  consequences,  with  effects  on:
     -     Changes  in  body  composition,  including  central  obesity;
     -     Lipids  in  the  blood;
     -     Muscle  strength;
     -     Bone  composition;
     -     Exercise  capacity  and  energy;
     -     Cardiovascular  risk;  and
     -     Psychological  well-being  (social  isolation  and  depression).

There are also studies indicating that patients with AGHD have an increased risk
of  mortality from cardiovascular disease, possibly attributable to their growth
hormone  (GH)  deficiency.

GH  deficiency  in adults can result from a pituitary or peri-pituitary tumor or
as  a  direct  result  of the surgery/radiation used to manage these conditions.
Less  commonly,  GH  deficiency  in  adults arises from a deficiency acquired in
childhood.


ABOUT  SAIZEN(R)

Saizen(R)  [somatropin  (rDNA  origin)  for injection] is a human growth hormone
produced  by  recombinant DNA technology. The recommended dose for adults at the
start  of  therapy  is .005 mg/kg daily. The dosage may be increased to not more
than  .01 mg/kg daily after four weeks depending upon the patient's tolerance of
treatment.

Saizen(R)  is  indicated  for  the  long-term  treatment of children with growth
failure  due  to  inadequate  secretion  of  endogenous  growth  hormone.  It is
indicated  for  replacement  of  endogenous growth hormone in adults with growth
hormone deficiency that meets the criteria of adult onset or childhood onset.

In  patients  with  AGHD,  the most common adverse events with associated growth
hormone  therapy  are  joint and muscle pain, edema, carpal tunnel syndrome, and
tingling.

Growth  hormone should be used with caution in patients with insulin resistance,
glucose intolerance, diabetes, hypothyroidism, intracranial hypertension, and in
women  who  are  pregnant  or  nursing.  GH  should not be used in patients with
Prader-Willi  syndrome  who  are  severely  obese  or  have  severe  respiratory
impairment;  in  the  presence  of  active  neoplasia;  and  in  patients  with
proliferative  or  preproliferative  diabetic  retinopathy;  or  in  patients
hospitalized  with  acute  critical  illnesses.

Full  prescribing  information  for  Saizen(R),  including  important  safety
information, is available at www.seronousa.com.
                             -----------------


ABOUT SERONO CONNECTIONS FOR GROWTH(R)

Connections  for  Growth(R)  provides  reimbursement  support  and  educational
materials  for  practitioners  and  families.  They offer educational materials,
reconstitution  and  dosage  information,  reimbursement  support,  access  to
cool.click(R)  supplies,  and contact information for local nurses in the Serono
Nurse  Network.



                                       ###

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.

                                       ###


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). 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).



FOR MORE INFORMATION, PLEASE CONTACT:

SERONO, GENEVA, SWITZERLAND:
MEDIA RELATIONS:            INVESTOR RELATIONS:
Tel: +41-22-739 36 00       Tel: +41-22-739 36 01
Fax: +41-22-739 3085        Fax: +41-22-739 30 22
http://www.serono.com       Reuters: SEO.VS/SRA.N
---------------------       Bloomberg: SEO VX/SRA US

SERONO, INC., ROCKLAND, MA
MEDIA RELATIONS:            INVESTOR RELATIONS:
Stacie Madden               Tel: +1 781 681 2552
Tel: +1 781 681 2496        Fax: +1 781 681 2912
stacie.madden@serono.com
------------------------



                                   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)



January 10, 2005                   By:     /s/ Stuart Grant
                                           ------------------------------
                                   Name:   Stuart Grant
                                   Title:  Chief Financial Officer