Hormonal contraception.
D003270:Contraceptive Agents / Q000008:administration & dosage*; D003276:Contraceptives, Oral / Q000008:administration & dosage; D003281:Contraceptives, Postcoital / Q000008:administration & dosage; D005069:Evaluation Studies as Topic; D005260:Female; D007987:Gonadotropin-Releasing Hormone; D006801:Humans; D007247:Infertility, Female; D007279:Injections, Subcutaneous; D008525:Medroxyprogesterone; D008598:Menstruation; D009640:Norethindrone; D009641:Norethynodrel; D010060:Ovulation; D011247:Pregnancy; D013997:Time Factors
D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D003281:Contraceptives, Postcoital; D007987:Gonadotropin-Releasing Hormone; D009641:Norethynodrel; D008525:Medroxyprogesterone; D009640:Norethindrone