He was widely recognised as a world leader in human reproduction research .
The late Dr Shan Ratnam -- Emeritus Professor Sittampalam Shanmugaratnam ( 1928 -- 2001 ) was head of the Department of Obstetrics and Gynaecology at the National University Hospital of Singapore .
Shan Ratnam was widely recognised as a world leader in human reproduction research .
The late Dr Shan Ratnam -- Emeritus Professor Sittampalam Shanmugaratnam ( 1928 -- 2001 ) was head of the Department of Obstetrics and Gynaecology at the National University Hospital of Singapore .