title: History of the first oral contraceptive.
mesh_terms: D003276:Contraceptives, Oral / Q000266:history*; D003278:Contraceptives, Oral, Hormonal / Q000266:history*; D004717:Endometrium / Q000502:physiology; D004967:Estrogens / Q000494:pharmacology; D005260:Female; D006065:Gonadotropins, Pituitary / Q000378:metabolism; D049673:History, 20th Century; D006801:Humans; D009641:Norethynodrel / Q000266:history / Q000494:pharmacology; D010053:Ovary / Q000502:physiology; D010060:Ovulation / Q000187:drug effects; D011374:Progesterone / Q000494:pharmacology; D011372:Progestins / Q000266:history; D013997:Time Factors; D014481:United States
chemical_list: D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal; D004967:Estrogens; D006065:Gonadotropins, Pituitary; D011372:Progestins; D011374:Progesterone; D009641:Norethynodrel