At the beginning of the twentieth century, Margaret Sanger, Mary Ware Dennett, and others began to defy these laws and advocate for the legalization of birth control and for better women's reproductive healthcare. By 1960 doctors had developed the Pill, but it wasn't until 1972 that all US citizens had legal access to birth control. And in the landmark decision Roe v Wade (1973), the US Supreme Court ruled that women had a constitutional right to terminate a pregnancy.