Caroline Merula Deys (2 July 1938 – 6 May 2019) was a British family planning doctor and later general practitioner. She won a key case against a General Medical Council complaint in 1972 that had been motivated by her work on legalising abortion in the UK. She performed around 4750 vasectomies in the 1970s, when she was the only female doctor specialising in the procedure in Europe.