[Oral contraception].
D003267:Contraception; D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D005260:Female; D006801:Humans; D009640:Norethindrone; D009641:Norethynodrel
D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D009641:Norethynodrel; D009640:Norethindrone
CONTRACEPTIVES, ORAL; NORETHINDRONE; NORETHYNODREL