How the oral contraceptives came to be developed.
D000818:Animals; D001317:Austria; D002417:Cattle; D003276:Contraceptives, Oral / Q000266:history*; D003278:Contraceptives, Oral, Hormonal / Q000266:history; D003280:Contraceptives, Oral, Synthetic / Q000266:history; D005260:Female; D005602:France; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D010053:Ovary / Q000502:physiology; D011247:Pregnancy; D051381:Rats; D012106:Research / Q000266:history; D013557:Switzerland; D014481:United States
D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal; D003280:Contraceptives, Oral, Synthetic