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 November, 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-______)



                                                               [GRAPHIC OMITTED]
                                                                          SERONO



Media  Release


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

NEITHER THIS ANNOUNCEMENT NOR ANY COPY OF IT MAY BE TRANSMITTED INTO CANADA OR
JAPAN OR TO PERSONS RESIDENT IN SUCH JURISDICTIONS



                  --------------------------------------------
                  | SERONO LAUNCHES CONVERTIBLE BOND OFFERING |
                  --------------------------------------------



GENEVA, SWITZERLAND, NOVEMBER 10, 2003 - SERONO S.A. (VIRT-X: SEO AND NYSE: SRA)

Serono  S.A.  announces  today that it has launched an offering of approximately
CHF600  million  senior unsubordinated convertible bonds due 2008 (the "Bonds"),
convertible  into  bearer  shares  of  Serono.

Serono  is  launching the issue of the Bonds to take advantage of the attractive
financing  opportunities currently available in the convertible bond market. The
offering  will  provide  additional  financial  resources  and flexibility while
capitalizing on the current favorable interest rate environment. The proceeds of
the  issue  will  be  used  for general corporate and strategic purposes outside
Switzerland.

The final terms of the Bonds are expected to be announced later today. The Bonds
will be issued by a wholly-owned subsidiary of Serono, and guaranteed by Serono.
The  settlement  date  of  the  Bonds  is  expected  to be November 26, 2003. An
application will be made to list the Bonds on the SWX Swiss Exchange.




                                       ###


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Stabilisation/FSA

This document does not constitute an offer to issue or sell, or the solicitation
of  an  offer  to  acquire  or buy, any Bonds to any person in any jurisdiction.

In  the United Kingdom, this announcement is directed exclusively at persons who
have  professional experience in matters relating to investments who fall within
Article  19  or  49  of  the  Financial Services and Markets Act 2000 (Financial
Promotion)  Order  2001. In the United Kingdom, the Bonds will only be issued to
such  persons.

The  Bonds,  the bearer shares to be issued upon conversion of the Bonds and the
guarantee in respect of the Bonds have not been and will not be registered under
the United States Securities Act of 1933.  Accordingly, the Bonds and the bearer
shares  to  be  issued  upon conversion of the Bonds may not be offered, sold or
distributed within the United States except pursuant to an exemption. There will
be no public offer for the Bonds or the bearer shares to be issued on conversion
of  the  Bonds  in  the  United  States.




                                       ###


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.

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                                                               [GRAPHIC OMITTED]
                                                                          SERONO



Media  Release


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

NEITHER THIS ANNOUNCEMENT NOR ANY COPY OF IT MAY BE TRANSMITTED INTO CANADA OR
JAPAN OR TO PERSONS RESIDENT IN SUCH JURISDICTIONS



                  --------------------------------------------
                  |        SERONO SUCCESSFULLY PRICES        |
                  | CHF600 MILLION CONVERTIBLE BOND OFFERING |
                  --------------------------------------------



GENEVA, SWITZERLAND, NOVEMBER 10, 2003 - SERONO S.A. (VIRT-X: SEO AND NYSE: SRA)

Serono S.A. announces today that the terms for its CHF600 million senior
unsubordinated convertible bonds due 2008 (the "Bonds"), convertible into bearer
shares of Serono, have been fixed as follows:

     -    The initial conversion price has been set at CHF1,415.11 per bearer
          share, which represents a 53.8% premium over the reference price of
          CHF920.

     -    Each Bond with a nominal value of CHF5,000 is initially convertible
          into 3.5333 bearer shares.

     -    The coupon is 0.50% per annum, payable annually.

     -    If not previously converted, the Bonds will be redeemed at 105.8108%
          (CHF5,290.54 each) on the maturity date, which is expected to be
          November 26, 2008, representing a yield to maturity of 1.625% per
          annum.

An application will be made to list the Bonds on the SWX Swiss Exchange. The
settlement day of the bonds is expected to be November 26, 2003.



                                       ###


                                                                             1/2


Stabilisation/FSA

This document does not constitute an offer to issue or sell, or the solicitation
of  an  offer  to  acquire  or buy, any Bonds to any person in any jurisdiction.

In  the United Kingdom, this announcement is directed exclusively at persons who
have  professional experience in matters relating to investments who fall within
Article  19  or  49  of  the  Financial Services and Markets Act 2000 (Financial
Promotion)  Order  2001. In the United Kingdom, the Bonds will only be issued to
such  persons.

The  Bonds,  the bearer shares to be issued upon conversion of the Bonds and the
guarantee in respect of the Bonds have not been and will not be registered under
the United States Securities Act of 1933.  Accordingly, the Bonds and the bearer
shares  to  be  issued  upon conversion of the Bonds may not be offered, sold or
distributed within the United States except pursuant to an exemption. There will
be no public offer for the Bonds or the bearer shares to be issued on conversion
of  the  Bonds  in  the  United  States.




                                       ###


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.

                                       ###


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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)


November 10, 2003                         By:    /s/ Allan Shaw
                                                 ----------------------------
                                          Name:  Allan Shaw
                                          Title: Chief Financial Officer