Deciding to specialize in obstetrics, he served his
National Service as a lieutenant in the
Royal Army Medical Corps in
Singapore, where he did much of his specialist training under
Benjamin Henry Sheares at the
British Military Hospital, Singapore. Returning to civilian life at the
Radcliffe Infirmary in
Oxford, in 1958 he was appointed a consultant in obstetrics and gynaecology to St. Mary's Hospital and Samaritan Hospital for Women, both of which he served for the next 31 years. While at St Mary's Hospital on May 27, 1971, he assisted in the first ever Caesarian section birth under an Epidural anaesthetic. He later also held the position of Consulting Gynaecological Surgeon to the
Middlesex Hospital; Soho Hospital for Women; Bolingbroke Hospital, Battersea; and the Radcliffe Infirmary from 1969 to 1980. Pinker accepted an increasing involvement with the
Royal College of Obstetricians and Gynaecologists, serving as Honorary Treasurer, 1970–77. He was a past president of the British Fertility Society and supported the research that led to the birth in 1978 of
Louise Brown, the first test-tube baby. His work at the Royal College earned him international respect amongst obstetricians and gynaecologists. In 1980 he was elected vice-president and finally President in 1987. He was President of the
Royal Society of Medicine from 1992 to 1994. ==Wellbeing of Women==