Joan Graeme Malleson, née Billson; 4 June 1899 – 14 May 1956) was an English physician, specialist in contraception and prominent advocate of the legalisation of abortion.Joan Billson was born at Ulverscroft, Leicestershire. She was educated at Bedales School, where she became Head Girl, and studied medicine at University College, London from 1918, later moving to Charing Cross Hospital due to the hostility to female students she experienced at UCL.