||- Chairman Ethical Committee of World Association of Perinatal Medicine
- Chairman Ethical Committee of Asia Oceana Federation of Obstetrics and Gynecology
- Member of FIGO Committee for the Study of Ethical Aspects of on Human Reproduction (1987-2004)
- Chairman of Ethical Committee of IFFS (1989-1994)
- Chairman of FIGO Committee for the Study of Ethical Aspects of on Human Reproduction (1994-98).
- President, International Academy of Human Reproduction
- Vice President, World Association of Perinatal Medicine
- President of the Extended European Board of Obstetrics and Gynecology (1993-1997)
- Vice President, European Association of Gynecology and Obstetrics (1996-2000).