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 February, 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
---------------------


            SERONO 2002 REVENUES BREAK THROUGH THE $1.5 BILLION MARK
                     PRODUCT SALES UP 13.9% TO $1.42 BILLION

             - STRONG FOURTH QUARTER WITH REVENUES UP 20.9% TO $442M
               AND EXCELLENT PERFORMANCE OF REBIF IN US AND EUROPE -

GENEVA, SWITZERLAND, FEBRUARY 3, 2003 - Serono S.A. (virt-x: SEO and NYSE: SRA),
the  third largest biotechnology company in the world, today reported its fourth
quarter and full year results for the period ended December 31, 2002.


KEY POINTS FOR FULL YEAR 2002

-    Total  revenues  up  12.4%  to  $1,546.5m
-    Product  sales  up  13.9%  to  $1,423.1m,  with Neurology sales up 44.6% to
     $548.8m  and  Reproductive  Health  franchise  growing  8.3%  to  $621.9m
-    Reported  net  income  up  1.3%  to  $320.8m  and  up 14.6% to $333.8m on a
     like-for-like*  basis, reflecting final stage of phase-out of urine-derived
     products
-    Net  cash  flows  from  operating  activities  up  31.4%  to  $532.0m
-    Reported  EPS  of  $20.07  per  bearer  share  and  $0.50  per  ADS  and
     like-for-like*  EPS  of $20.88 per bearer share and $0.52 per ADS. Proposed
     dividend  of  CHF7.00  per  bearer  share  and  of  CHF0.175  per  ADS**
-    Two  in-licensing  agreements  signed  in fourth quarter - Novantrone(R), a
     marketed  product  in  the  US,  from  Amgen  and  cladribine  from  IVAX
-    2003  outlook  is  growth  of  15%  to 20% in total revenues and net income
     growth  of  15%  to  20%  on  a  reported  basis


"2002  was  a  very  successful year for our company.  We broke through the $1.5
billion  revenue  mark  and  achieved  sales  growth  of  13.9%,"  said  Ernesto
Bertarelli,  Chief Executive Officer of Serono.  "I am particularly pleased with
the excellent performance of Rebif in the US, and the significant investments we
have  made,  which  position  us  very  well  for  future  growth."

* Excluding a  $16.3m  restructuring charge, related primarily to the closure of
production  facilities  for  urine-derived  reproductive  hormones, taken in the
fourth  quarter  of 2002, and exceptional licensing payments of $27.6m and $0.6m
received  from  a third party in 2001 and 2002 respectively from the divestiture
of  a  product  which  was  non-core  to Serono's business - see attached income
statements

** i.e. $0.13 based on an exchange rate of $1=CHF1.3578, as of January 31, 2003.
The actual dividend will be based on the exchange rate in effect on the date the
dividend  is  converted  into  $  by  the  depositary  for  the  ADS


                                     -more-


"Our excellent cash flow has led to a further strengthening of our balance sheet
during the past year," said Allan Shaw, Chief Financial Officer.  "This provides
us with the financial flexibility to continue investing in opportunities to grow
our  business."

FOURTH QUARTER AND FULL YEAR FINANCIAL PERFORMANCE

Total  revenues  increased  by  12.4% to $1,546.5m in the full year 2002, and by
20.9%  to  $442.1m  in  the  fourth  quarter  (2001:  $365.6m).

Worldwide  product sales were $1,423.1m in 2002, up 13.9% (2001: $1,249.4m), and
up  21.0%  to  $409.4m  in  the  fourth  quarter  (2001:  $338.4m).

Royalty  and  licensing income was $123.4m in 2002 (2001: $127.1m which included
exceptional  payments of $27.6m from a third party related to the divestiture of
a  product  which was non-core to Serono's business).  It was up 20.1% to $32.7m
(2001:  $27.2m)  in  the  fourth  quarter.  This  increase  largely reflects the
licensing  income related to the co-promotion with Pfizer of Rebif(R) in the US.

The  gross margin has increased to 84.3% of product sales in 2002 (2001: 82.9%),
as  a  result  of  the  continued  increase  in  the proportion of biotechnology
products  among  our  total  sales as well as further manufacturing improvements
leading  to higher production yields.  In the fourth quarter of 2002 recombinant
products  accounted  for  87.9%  of  product  sales  (Q4  2001:  82.1%).

Selling,  General  and  Administrative  expenses  were $512.9m or 33.2% of total
revenues  in  2002  (2001:  $446.9m  or  32.5%  of total revenues), and 33.7% of
revenues  at $148.9m in the fourth quarter (2001: $126.7m or 34.7% of revenues).

Research and Development expenses were $358.1m or 23.2% of total revenues (2001:
$308.6m  or  22.4%  of  total revenues) in the full year, and $95.4m or 21.6% of
total  revenues in the fourth quarter (2001: $80.0m or 21.9% of total revenues).

In order to proceed with the final stage of closure of its production facilities
for urine-derived reproductive hormone products in Italy, Serono decided to take
a  restructuring charge of $16.3m in the fourth quarter.  This business decision
reflects  Serono's  strategic  emphasis  on high quality human proteins produced
through recombinant technology for the treatment of infertility.  We expect this
final  phase-out  to have a positive impact on gross margin and a neutral effect
on  sales  growth  of  reproductive  health  products over the next two to three
years.

Other  operating  expenses  in  2002  were $85.8m (2001: $70.2m).  In the fourth
quarter,  the  increase  in  other  operating  expenses to $27.7m (2001: $18.8m)
reflects increased royalties to third parties related to Serono's product sales,
as  well  as  the  amortisation  of  goodwill associated with the acquisition of
Genset.


                                     -more-


Full  year  2002  operating  income  increased  by  3.5%  to $349.6m or 22.6% of
revenues  (2001:  $337.7m  or  24.5%  of revenues), and was $88.6m in the fourth
quarter  or  20.0%  of total revenues (2001: $88.1m or 24.1% of total revenues).

Net  financial  income  was  $36.5m  in  2002  (2001: $51.4m) reflecting the low
interest  rates  in  the  past  year, and was $9.2m in the fourth quarter (2001:
$2.9m).

Total  taxes  in  2002 were $63.1m, representing an overall tax rate of 16.4% of
profit  before tax (2001: $69.8m, or 18.1% of profit before tax).  In the fourth
quarter,  taxes  were  $15.8m,  or  16.2%  of  profit  before  tax.

Net  income  in the full year 2002 was up 1.3% to $320.8m (2001: $316.7m).  On a
like-for-like*  basis  net  income in 2002 rose by 14.6% to $333.8m, or 21.6% of
total  revenues.  In the fourth quarter, reported net income grew 6.3% to $81.6m
or  18.5%  of  total  revenues  (2001:  $76.7m  or  21.0%  of  total  revenues).

Despite the large fluctuation of the US dollar versus European currencies during
the year, the broad geographic nature of our international operations provided a
natural  hedge to the company's currency exposures in 2002.  The negative impact
of translation of currency on our operating results was $2.9m, or less than a 1%
effect  on  reported  net  income.

Basic  earnings  per share (EPS) were $20.07 per bearer share (2001: $19.72) and
$0.50  per  American  Depositary  Share (ADS) (2001: $0.49). On a like-for-like*
basis  EPS  were  $20.88  per bearer share (2001: $18.14) and $0.52 per American
Depositary  Share  (ADS)  (2001:  $0.45).

On  May  6,  2003,  the  Board  of  Directors will propose to the Annual General
Meeting  a cash dividend of CHF7.0 per bearer share (2001: CHF 6.25) or CHF0.175
per  ADS**,  representing  a  payout  ratio  of  25.7%  (2001: 18.8%) at current
exchange  rates.

For  the  full  year  ended  2002,  net  cash flow from operating activities was
$532.0m,  up  31.4%  compared  to  $405.0m  for  2001.

On  July  15  Serono  announced  a  share buy back program for the repurchase of
bearer  shares  up to a value of CHF 500m over a three-year period.  At the year
end, 226,507 shares had been purchased on the open market, representing 34.6% of
the  authorised  amount.

As of December 31, 2002, there were 15.851 million outstanding equivalent bearer
shares.  5.5%  of  bearer  shares were in the form of American Depositary Shares
(24.957  million  ADS  outstanding)  representing  3.9%  of  Serono's  market
capitalization.

* Excluding a  $16.3m  restructuring charge, related primarily to the closure of
production  facilities  for  urine-derived  reproductive  hormones, taken in the
fourth  quarter  of 2002, and exceptional licensing payments of $27.6m and $0.6m
received  from  a third party in 2001 and 2002 respectively from the divestiture
of  a  product  which  was  non-core  to Serono's business - see attached income
statements

** i.e. $0.13 based on an exchange rate of $1=CHF1.3578, as of January 31, 2003.
The actual dividend will be based on the exchange rate in effect on the date the
dividend  is  converted  into  $  by  the  depositary  for  the  ADS


                                     -more-


NEUROLOGY - REBIF(R) BECOMES TOP-SELLING PRODUCT IN 2002

Full  year sales of Rebif(R) (interferon beta 1-a) in multiple sclerosis were up
44.6%  to $548.8m (2001: $379.6m) making it the Company's top selling product in
2002.  In  the  fourth  quarter,  worldwide sales of Rebif(R) in MS increased by
55.3%  to  $171.5m  (2001:  $110.5m).

Building  on  the  excellent  US  launch  of  Rebif(R)  in  March  2002,  Serono
successfully  started  the  co-promotion  with  Pfizer and initiated a direct to
consumer  marketing campaign.  Sales in the US were $34.7m in the fourth quarter
and  $71.2m  for  the  full year.  At the end of the fourth quarter, over 13,000
patients  were  being  treated  with Rebif(R) in the US and our estimated dollar
market  share  was  8.5%.

Rebif(R)  continues  its  market  leadership  outside  the  US  with  2002 sales
increasing  by 25.8% to $477.6m in the rest of the world (2001: $379.6m), within
which  European  sales  increased  by  29.9% to $314.1m (2001: $241.9m).  In the
fourth  quarter  of  2002  Rebif(R)  sales in Europe were $91.9m, an increase of
28.8%.

In November 2002, the 12-month data from the EVIDENCE study was published in the
peer-reviewed  journal  Neurology. This data had been instrumental in overcoming
the  Orphan  Drug  status of Avonex(R), currently the market leading product for
multiple  sclerosis  in  the  US.  Publication of this data allows it to be more
effectively  disseminated  in  the  neurological  community  worldwide.

In  the  fourth  quarter  of  2002  Serono  successfully concluded its licensing
agreement  with  Amgen  for  the  marketed  product  Novantrone(R)  in  the  US.
Novantrone(R),  for worsening forms of MS is complementary to Rebif(R) and makes
Serono  the only MS company to offer a portfolio of products to neurologists and
patients.  This  is  consistent  with  our  strategy  of building the leading MS
portfolio.

REPRODUCTIVE HEALTH - COMPLETE RECOMBINANT PORTFOLIO DELIVERING RESULTS

In 2002, worldwide reproductive health sales grew 8.3%, which is faster than the
overall  reproductive  health  market, to $621.9m (2001: $574.3m) and by 7.1% to
$165.8m in the fourth quarter (2001: $154.8m).  Sales of Gonal-F(R) (recombinant
human  FSH) increased by 9.7% to $450.4m (2001: $410.5m) in the full year and by
10.6%  to  $121.3m  (2001:  $109.7m)  in  the  fourth  quarter.

Given the demonstrated benefits of recombinant products in infertility, Serono's
strategy  for  some  time  now  has been to replace old-generation urine-derived
products  as the recombinant products are registered and become available around
the  world.  Recombinant human DNA technology is a superior method for providing
human  proteins  for  therapeutic use as it enables the production of consistent
and  extremely  pure  proteins  in guaranteed quantities. In accordance with our
strategy, the Company is now proceeding with the final closure of its production
facilities  for  urine-derived  products.  During  the  phase-out  period,
urine-derived  products will remain available on a country by country basis, and
we  expect  substantial  sales  from  existing  inventory.  At  the  end of 2002
recombinant  products  accounted  for  more  than  89.9%  of  Serono's  combined
gonadotropin  sales  in  the  US  and  Europe.


                                     -more-


METABOLIC ENDOCRINOLOGY

Saizen(R)  sales increased by 15.6% to $124.0m (2001: $107.3m) in 2002, and were
up 24.8% to $36.0m (2001: $28.9m) during the fourth quarter.

Serostim(R)  sales  reached  $95.1m  in  the full year (2001: $125.3m), and were
$26.5m  (2001:  $27.0m)  in  the  fourth  quarter.

In  October  2002,  Serono  announced  the implementation of the new Serostim(R)
Secured  Distribution  Program  in  the US. This is designed to track and manage
Serostim(R)  through  the  distribution  process,  and  ensure that patients who
require  Serostim(R)  receive  genuine  products  on  a  timely  basis.

REGIONAL SALES

North American sales grew by 22.8% to $479.6m in 2002 (2001: $390.6m).  European
sales  increased by 14.4% to $620.4m (2001: $542.2m).  Sales in the Middle East,
Africa  and Eastern Europe were up 28.0% to $107.6m (2001: $84.1m), and up 22.8%
in  Oceania  to  $21.9m  (2001:  $17.9m).  Sales in Asia Pacific were up 1.4% to
$55.2m  (2001:  $54.4m)  and  were  steady  at  $29.2m  in Japan (2001: $29.3m).
Economic  conditions  in  Latin  America led to lower full year sales of $109.2m
(2001:  $130.9m).

SIGNIFICANT ADDITIONS TO DEVELOPMENT PIPELINE THROUGH LICENSING ACTIVITIES

2002 was a year of significant progress in the area of business development with
the achievement of agreements with leading biotechnology partners for late-stage
and  marketed  products.  Through  these  agreements  Serono  has  augmented its
position  in  existing  therapeutic  areas  and  accelerated  its entry into the
important  new  area  of  psoriasis.  Although  associated  with  some  earnings
dilution  in  the  short-term  these agreements are expected to be catalysts for
growth  in  the  medium  to  long  term.  The  key  agreements  concluded  were:

     -    In  November 2002 Amgen licensed to Serono the rights to commercialize
          Novantrone(R)  (mitoxantrone)  in  the  US.

     -    In  August 2002 Genentech licensed to Serono the rights to develop and
          market  Raptiva(TM)  (efalizumab)  for psoriasis worldwide, except for
          the  US, Japan and certain Asian countries. This agreement also covers
          co-development  of  Raptiva(TM)  for additional indications, including
          rheumatoid  arthritis,  which  is  currently  in  Phase  2.

In addition

     -    In  July 2002 AstraZeneca licensed to Serono the rights to develop and
          market  the  aromatase  inhibitor, anastrozole, in female infertility.

     -    In  October  2002  IVAX  and  Serono  agreed  to  develop  and  market
          cladribine,  a  potential  oral  therapy  for  MS.


                                     -more-


R&D NEWS

In  2002,  Serono  successfully  acquired Genset, creating a unique genetics and
genomics  discovery  platform.  The  integration  of  Genset  is  now completed.

During  last  year,  the  following  projects have moved into or through the R&D
pipeline:

     -    Following  the  positive  outcome  of  a  Phase  2  clinical trial for
          onercept  (r-TBP-1)  in  psoriasis  and psoriatic arthritis, a Phase 3
          study  is  planned  to  start  in  the  second  half  of  this  year.

     -    Raptiva(TM), in-licensed from  Genentech,  will be filed in Europe for
          moderate  to  severe  psoriasis  during  the first quarter 2003 and is
          currently  in  Phase  2  in  rheumatoid  arthritis.

     -    Following  the  positive  outcome  of  a  Phase  3  clinical  trial of
          Serostim(R)  in short bowel syndrome, a regulatory submission has been
          made  to  FDA  in  the fourth quarter of 2002. Results from this study
          were  also  presented  at  the  Nutrition Week meeting in San Antonio,
          Texas,  on  January  21,  2003.

     -    Phase  1  studies  of  r-IL-18  binding protein are now completed, and
          further  studies  in  patients with psoriasis and rheumatoid arthritis
          are  planned  to  start  in  2003.

     -    A  large  Phase  2  study  of anastrozole for ovulation induction will
          start  in  the  US  in  the  first  quarter  of  this  year.

     -    The  positive  outcome of a Phase 2/3 clinical trial of Serostim(R) in
          HARS  (HIV-associated  adipose redistribution syndrome) was announced.

     -    A  Phase  3  trial  of  r-IFN-beta  1a  in Asian patients with chronic
          hepatitis  C  was  initiated.

     -    PEG-GHRF  (pegylated  growth  hormone releasing factor), which has the
          potential to treat disorders related to growth hormone deficiency, has
          recently  moved  to  Phase  1  studies.

     -    Phase  1  trials of an oral formulation of cladribine, being developed
          by  Serono  and  IVAX,  are  planned  for  2003.

     -    A  Phase  2  study  of r-hLIF for the treatment of embryo implantation
          failure  will  be  initiated  in  early  2003.

     -    Based  on  preclinical  work  in diabetic neuropathy, r-IL-6 (atexakin
          alfa)  is  moving  into  Phase  2.

OUTLOOK FOR THE FULL YEAR 2003

Given  the  strong outlook for Rebif(R), the performance of Reproductive Health,
and  taking  into  account  the business developments of 2002, Serono expects US
dollar  growth  in 2003 of 15% to 20% in total revenues and US dollar net income
growth  of  15%  to  20%  on  a  reported  basis.


                                     -more-


CONFERENCE CALL AND WEBCAST

Serono  will hold a conference call today, February 3, 2003, starting at 3.00 pm
Central  European  Time  (09.00  am Eastern Time) during which Serono Management
will  present  the  Company's Fourth Quarter and Full Year 2002 Results. To join
the  telephone  conference please dial 091 610 5600 (from Switzerland), 0207 866
4111  (from  the  UK),  412  858  4600  (from  the US) and +41 91 610 5600 (from
elsewhere).  Telephone  playback will be available one hour after the conference
call  and  until  close  of business 5.00 pm CET on February 5, 2003.  To access
this  playback  please  dial  the  following  numbers:  091  612  4330  (from
Switzerland), 0207 866 4300 (from the UK), 412 858 1440 (from the US) and +41 91
612  4330  (from  elsewhere)  and  enter  the  PIN  code  247# from a touch tone
telephone.

The  event  will  also be relayed by live audio webcast which interested parties
may  access  via  Serono's  Corporate  home  page, www.serono.com. A link to the
webcast  will  be  provided  immediately  prior to the event.  Additionally, the
webcast  will  be  available  for replay until close of business on February 18,
2003.

                                       ###
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 May 21, 2002.  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 six recombinant
products  on  the  market,  Gonal-F(R),  Luveris(R),  Ovidrel(R)/Ovitrelle(R),
Rebif(R),  Serostim(R) and Saizen(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. 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.

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).


                                     -more-


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


On the following pages, there are:

     -    Tables  detailing  sales  in  dollars  by therapeutic area, geographic
          region  and the top 10 products for the 3 and 12 months ended December
          31,  2002  and  2001.

     -    The  unaudited  consolidated  financial  statements  for  the 3 and 12
          months  ended December 31, 2002 and 2001, including income statements,
          balance  sheets  and  statements of cash flows, prepared in accordance
          with  International  Accounting  Standards  (I.A.S.).


                                     -more-




                                  TOP TEN PRODUCTS


                             THREE MONTHS ENDED               THREE MONTHS ENDED
                             DECEMBER 31, 2002                DECEMBER 31, 2001
                        -----------------------------------------------------------

                 * TA    $ MILLION  % OF SALES   % CHANGE $   $ MILLION  % OF SALES
                                                      
Rebif(R)        MS          171.5        41.9%        55.3%     110.5         32.6%
Gonal-F(R)      RH          121.3        29.6%        10.6%     109.7         32.4%
Saizen(R)       Growth       36.0         8.8%        24.8%      28.9          8.5%
Serostim(R)     Wasting      26.5         6.5%       (1.8%)      27.0          8.0%
Pergonal(R)     RH           13.3         3.2%        11.4%      11.9          3.5%
Metrodin HP(R)  RH           10.4         2.5%      (39.9%)      17.3          5.1%
Cetrotide(R)    RH            5.4         1.3%        38.1%       3.9          1.2%
Profasi(R)      RH            5.0         1.2%      (23.2%)       6.5          1.9%
Stilamin(R)     Other         3.7         0.9%      (26.5%)       5.0          1.5%
Crinone(R)      RH            3.1         0.8%       484.1%      (0.8)       (0.2%)


                             TWELVE MONTHS ENDED              TWELVE MONTHS ENDED
                             DECEMBER 31, 2002                DECEMBER 31, 2001
                        -----------------------------------------------------------

                   * TA  $ MILLION  % OF SALES   % CHANGE $   $ MILLION  % OF SALES

Rebif(R)        MS          548.8        38.6%        44.6%     379.6         30.4%
Gonal-F(R)      RH          450.4        31.7%         9.7%     410.5         32.9%
Saizen(R)       Growth      124.0         8.7%        15.6%     107.3          8.6%
Serostim(R)     Wasting      95.1         6.7%      (24.1%)     125.3         10.0%
Metrodin HP(R)  RH           50.1         3.5%      (25.3%)      67.1          5.4%
Pergonal(R)     RH           46.0         3.2%        20.7%      38.1          3.0%
Profasi(R)      RH           19.8         1.4%      (16.9%)      23.8          1.9%
Cetrotide(R)    RH           18.4         1.3%        73.1%      10.6          0.8%
Stilamin(R)     Other        13.9         1.0%      (17.9%)      16.9          1.4%
Crinone(R)      RH           10.9         0.8%       347.0%       2.4          0.2%



                             * THERAPEUTIC AREAS
  RH   =  Reproductive Health                    Wasting   =  AIDS Wasting
  MS   =  Multiple Sclerosis                     Growth    =  Growth Retardation


                                     -more-




CONSOLIDATED INCOME STATEMENTS


THREE MONTHS ENDED DECEMBER 31                 2002 *       %  OF                    2001 *         %  of
                                              US$'000     REVENUES     % change     US$'000       Revenues
                                                                                             
Revenues
Product sales                                 409,429                      21.0%      338,440
Royalty and license income                     32,654                      20.1%       27,186
-------------------------------------------------------------------------------------------------------------
TOTAL REVENUES                                442,083          100.0%      20.9%      365,626          100.0%
-------------------------------------------------------------------------------------------------------------
Operating Expenses
Cost of product sales                          65,167                      25.4%       51,985
% of Sales                                       15.9%                                   15.4%
Selling, general and administrative           148,865           33.7%      17.5%      126,702           34.7%
Research and development                       95,418           21.6%      19.2%       80,042           21.9%
Restructuring                                  16,303            3.7%     100.0%            0            0.0%
Other operating expense, net                   27,748            6.3%      47.7%       18,792            5.1%
-------------------------------------------------------------------------------------------------------------
Total Operating Expenses                      353,501           80.0%      27.4%      277,521           75.9%
-------------------------------------------------------------------------------------------------------------
OPERATING INCOME                               88,582           20.0%       0.5%       88,105           24.1%
-------------------------------------------------------------------------------------------------------------
Financial income, net                           9,152                     210.9%        2,944
Other expense/(income), net                      (175)                                    722
-------------------------------------------------------------------------------------------------------------
Total Non Operating Income, Net                 9,327                                   2,222
-------------------------------------------------------------------------------------------------------------
Income Before Taxes and Minority Interests     97,909           22.1%       8.4%       90,327           24.7%
Taxes                                          15,849                                  13,546
-------------------------------------------------------------------------------------------------------------
Income Before Minority Interests               82,060                                  76,781
Minority interests                                474                                      42
-------------------------------------------------------------------------------------------------------------
NET INCOME                                     81,586           18.5%       6.3%       76,739           21.0%
-------------------------------------------------------------------------------------------------------------

Exceptional items
-----------------
License income 1)                                   0                                    (419)
Restructuring charges 2)                       16,303                                       0
Tax impact of exceptional items                (2,690)                                     34
-------------------------------------------------------------------------------------------------------------
NET INCOME W/O EXCEPTIONAL ITEMS               95,199           21.5%      24.7%       76,354           20.9%
-------------------------------------------------------------------------------------------------------------

* Unaudited

1)   Payments  from  a  third  party  for the divestiture of a product which was
     non-core  to  Serono's  business

2)   Restructuring  charges  primarily  related  to phased closure of production
     facilites  for  urine-derived  reproductive  hormone  products


                                                 2002           2001    % CHANGE         2002         2001  % CHANGE
                                                                                      WITHOUT      Without
                                                                                  EXCEPTIONAL  exceptional
Basic Earnings per Share (in U.S. dollars)                                              ITEMS        items
--------------------------------------------------------------------------------------------------------------------
 - Bearer shares                                 5.15           4.78        7.7%         6.01           4.75   26.3%
--------------------------------------------------------------------------------------------------------------------
 - Registered shares                             2.06           1.91        7.7%         2.40           1.90   26.3%
--------------------------------------------------------------------------------------------------------------------
 - American depositary shares                    0.13           0.12        7.7%         0.15           0.12   26.3%
--------------------------------------------------------------------------------------------------------------------

Diluted Earnings per Share (in U.S. dollars)
 - Bearer shares                                 5.14           4.77        7.8%         6.00           4.75   26.4%
--------------------------------------------------------------------------------------------------------------------
 - Registered shares                             2.06           1.91        7.8%         2.40           1.90   26.4%
--------------------------------------------------------------------------------------------------------------------
 - American depositary shares                    0.13           0.12        7.8%         0.15           0.12   26.4%
--------------------------------------------------------------------------------------------------------------------


Basic earnings per share are calculated in accordance with IAS 33 (Earnings per
Share) by dividing the net income of the group, US$81.6 million (2001 US$76.7
million), by an appropriate number of shares. This is 11,446,403 bearer shares
(2001 11,655,237) and 11,013,040 registered shares (2001 11,013,040). The total
weighted average equivalent number of bearer shares is 15,851,619 (2001
16,060,453) for the three months ended December 31, 2002. As each American
depositary share represents ownership interest in one fortieth of a bearer
share, basic and diluted earnings per American depositary share is calculated as
one fortieth of the earnings per bearer share.

For diluted earnings per share, the total number of bearer shares is adjusted to
assume conversion of all share options granted to employees and directors. The
number of bearer shares used to calculate diluted earnings per share is
11,457,771 (2001 11,679,571).


                                     -more-




CONSOLIDATED INCOME STATEMENTS


TWELVE MONTHS ENDED DECEMBER 31                 2002 *        %  OF                      2001          %  of
                                               US$'000      REVENUES     % change     US$'000       Revenues
                                                                                   
Revenues
Product sales                                 1,423,130                      13.9%    1,249,405
Royalty and license income                      123,399                     (2.9%)      127,065
---------------------------------------------------------------------------------------------------------------
TOTAL REVENUES                                1,546,529          100.0%      12.4%    1,376,470          100.0%
---------------------------------------------------------------------------------------------------------------
Operating Expenses
Cost of product sales                           223,751                       5.0%      213,160
% of Sales                                         15.7%                                   17.1%
Selling, general and administrative             512,942           33.2%      14.8%      446,945           32.5%
Research and development                        358,099           23.2%      16.1%      308,561           22.4%
Restructuring                                    16,303            1.1%     100.0%            0            0.0%
Other operating expense, net                     85,811            5.5%      22.3%       70,152            5.1%
---------------------------------------------------------------------------------------------------------------
Total Operating Expenses                      1,196,906           77.4%      15.2%    1,038,818           75.5%
---------------------------------------------------------------------------------------------------------------
OPERATING INCOME                                349,623           22.6%       3.5%      337,652           24.5%
---------------------------------------------------------------------------------------------------------------
Financial income, net                            36,476                    (29.0%)       51,381
Other expense, net                                1,658                                   2,548
---------------------------------------------------------------------------------------------------------------
Total Non Operating Income, Net                  34,818                                  48,833
---------------------------------------------------------------------------------------------------------------
Income Before Taxes and Minority Interests      384,441           24.9%     (0.5%)      386,485           28.1%
Taxes                                            63,127                                  69,816
---------------------------------------------------------------------------------------------------------------
Income Before Minority Interests                321,314                                 316,669
Minority interests                                  536                                     (52)
---------------------------------------------------------------------------------------------------------------
NET INCOME                                      320,778           20.7%       1.3%      316,721           23.0%
---------------------------------------------------------------------------------------------------------------

Exceptional items
-----------------
License income 1)                                  (629)                                (27,609)
Restructuring charges 2)                         16,303                                       0
Tax impact of exceptional items                  (2,640)                                  2,209

---------------------------------------------------------------------------------------------------------------
NET INCOME W/O EXCEPTIONAL ITEMS                333,812           21.6%      14.6%      291,321           21.6%
---------------------------------------------------------------------------------------------------------------

* Unaudited

1)   Payments  from  a  third  party  for the divestiture of a product which was
     non-core  to  Serono's  business
2)   Restructuring  charges  primarily  related  to phased closure of production
     facilites  for  urine-derived  reproductive  hormone  products


                                                   2002           2001    % CHANGE         2002         2001  % CHANGE
                                                                                        WITHOUT      Without
                                                                                    EXCEPTIONAL  exceptional
Basic Earnings per Share (in U.S. dollars)                                                ITEMS        items
----------------------------------------------------------------------------------------------------------------------
 - Bearer shares                                  20.07          19.72        1.8%        20.88          18.14   15.1%
----------------------------------------------------------------------------------------------------------------------
 - Registered shares                               8.03           7.89        1.8%         8.35           7.25   15.1%
----------------------------------------------------------------------------------------------------------------------
 - American depositary shares                      0.50           0.49        1.8%         0.52           0.45   15.1%
----------------------------------------------------------------------------------------------------------------------

Diluted Earnings per Share (in U.S. dollars)
 - Bearer shares                                  20.04          19.68        1.8%        20.86          18.10   15.2%
----------------------------------------------------------------------------------------------------------------------
 - Registered shares                               8.02           7.87        1.8%         8.34           7.24   15.2%
----------------------------------------------------------------------------------------------------------------------
 - American depositary shares                      0.50           0.49        1.8%         0.52           0.45   15.2%
----------------------------------------------------------------------------------------------------------------------



Basic earnings per share are calculated in accordance with IAS 33 (Earnings per
Share) by dividing the net income of the group, US$320.8 million (2001 US$316.7
million), by an appropriate number of shares. This is 11,580,610 bearer shares
(2001 11,658,108) and 11,013,040 registered shares (2001 11,013,040). The total
weighted average equivalent number of bearer shares is 15,985,826 (2001
16,063,324) for the twelve months ended December 31, 2002. As each American
depositary share represents ownership interest in one fortieth of a bearer
share, basic and diluted earnings per American depositary share is calculated as
one fortieth of the earnings per bearer share.

For diluted earnings per share, the total number of bearer shares is adjusted to
assume conversion of all share options granted to employees and directors. The
number of bearer shares used to calculate diluted earnings per share is
11,598,154 (2001 11,687,609).


                                     -more-




CONSOLIDATED BALANCE SHEETS


As of                                                           DECEMBER 31, 2002 *    December 31, 2001
                                                                           US$000                 US$000
                                                                                
ASSETS
Current Assets
Cash and cash equivalents                                                   686,033           1,131,091
Short-term investments                                                      378,865             344,413
Trade accounts receivable                                                   257,313             234,490
Inventories                                                                 259,477             196,063
Prepaid expenses                                                             26,609              21,857
Other current assets                                                        208,100             134,955
--------------------------------------------------------------------------------------------------------
Total Current Assets                                                      1,816,397           2,062,869
--------------------------------------------------------------------------------------------------------

Long-Term Assets
Property, plant and equipment                                               554,509             460,767
Long-term financial assets                                                  711,201             241,009
Intangible assets                                                           216,371             110,615
Deferred tax assets                                                         136,687             107,115
Other long-term assets                                                       59,509              36,394
--------------------------------------------------------------------------------------------------------
Total Long-Term Assets                                                    1,678,277             955,900
--------------------------------------------------------------------------------------------------------
TOTAL ASSETS                                                              3,494,674           3,018,769
--------------------------------------------------------------------------------------------------------

LIABILITIES
Current Liabilities
Bank advances                                                                70,093             154,295
Trade accounts payable                                                       60,591              60,151
Current portion of long-term debt                                            23,505              18,959
Income taxes                                                                 55,152              55,948
Other current liabilities                                                   332,893             246,157
--------------------------------------------------------------------------------------------------------
Total Current Liabilities                                                   542,234             535,510
--------------------------------------------------------------------------------------------------------

Long-Term Liabilities
Long-term debt                                                               25,857              37,325
Deferred tax liabilities                                                     12,080               9,003
Other long-term liabilities                                                 452,140             217,430
--------------------------------------------------------------------------------------------------------
Total Long-Term Liabilities                                                 490,077             263,758
--------------------------------------------------------------------------------------------------------
Total Liabilities                                                         1,032,311             799,268
--------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------
Minority Interests                                                            1,165                 587
--------------------------------------------------------------------------------------------------------

SHAREHOLDERS' EQUITY
Share capital                                                               249,408             252,955
Share premium                                                               866,689             966,295
Retained earnings                                                         1,364,626           1,108,086
Fair value reserves                                                         (44,807)            (25,135)
Cumulative foreign currency translation adjustments                          25,282             (83,287)
--------------------------------------------------------------------------------------------------------
Total Shareholders' Equity                                                2,461,198           2,218,914
--------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------
Total Liabilities, Minority Interests and Shareholders' Equity            3,494,674           3,018,769
--------------------------------------------------------------------------------------------------------


*  Unaudited


                                     -more-




CONSOLIDATED STATEMENTS OF CASH FLOWS


Twelve months ended December 31                                          2002 *       2001
                                                                         US$000      US$000
                                                                             
Cash Flows From Operating Activities
Income before taxes and minority interests                               384,441     386,485
Depreciation and amortization                                            100,552      98,906
Financial income                                                         (64,645)    (75,858)
Financial expense                                                         10,643      14,709
Other non-cash items                                                      17,233      25,595
---------------------------------------------------------------------------------------------
Cash Flows From Operating Activities Before Working Capital Changes      448,224     449,837
---------------------------------------------------------------------------------------------

Working Capital Changes
Trade accounts payable, other current liabilities and deferred income    208,341      20,530
Trade accounts receivable                                                 (3,968)    (22,231)
Inventories                                                              (32,620)    (37,335)
Prepaid expenses and other current assets                                (25,482)     34,879
Taxes paid                                                               (62,513)    (40,730)
---------------------------------------------------------------------------------------------
NET CASH FLOWS FROM OPERATING ACTIVITIES                                 531,982     404,950
---------------------------------------------------------------------------------------------

Cash Flows From Investing Activities
Acquisition of subsidiary, net of cash acquired                         (115,092)          -
Purchase of property, plant and equipment                                (99,144)    (78,565)
Purchase of intangible and other long-term assets                        (25,194)    (44,352)
Purchase of financial assets                                            (860,407)   (188,853)
Other non-current liabilities                                            (10,257)      1,653
Proceeds from sale of financial assets                                   344,362     871,343
Disposals of subsidiary, net of cash disposed                              6,628           -
Proceeds from sale of property, plant and equipment                       10,488      11,033
Interest received                                                         48,005      76,076
---------------------------------------------------------------------------------------------
Net Cash Flows From Investing Activities                                (700,611)    648,335
---------------------------------------------------------------------------------------------

Cash Flows From Financing Activities
Proceeds from issuance of share capital                                   11,611           -
Proceeds from exercises of stock options                                   1,454       1,825
Purchase of treasury shares                                             (117,422)     (5,578)
Repayment of bank advances                                               (94,490)        639
Repayment of long-term debt                                              (17,642)    (73,701)
Interest paid                                                             (8,120)    (13,810)
Dividends paid                                                           (64,240)    (53,759)
---------------------------------------------------------------------------------------------
Net Cash Flows From Financing Activities                                (288,849)   (144,384)
---------------------------------------------------------------------------------------------
Effect of Exchange Rate Changes on Cash and Cash Equivalents              12,420        (819)
---------------------------------------------------------------------------------------------
Net Increase in Cash and Cash Equivalents                               (445,058)    908,082
---------------------------------------------------------------------------------------------

Cash and Cash Equivalents
- Beginning of period                                                  1,131,091     223,009
---------------------------------------------------------------------------------------------
- End of period                                                          686,033   1,131,091
---------------------------------------------------------------------------------------------


*  Unaudited


                                      -end-


                                   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)



February 3, 2003                    By:  /s/  Allan  Shaw
                                         -------------------------------
                                         Name:   Allan Shaw
                                         Title:  Chief Financial Officer