title: Principles of oral contraception. 1. Mode of action of oral contraceptives.
mesh_terms: D003270:Contraceptive Agents / Q000008:administration & dosage; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003281:Contraceptives, Postcoital / Q000494:pharmacology; D004338:Drug Combinations; D004967:Estrogens / Q000494:pharmacology; D005260:Female; D006801:Humans; D010060:Ovulation / Q000187:drug effects*; D011374:Progesterone / Q000494:pharmacology; D011453:Prostaglandins / Q000494:pharmacology; D013997:Time Factors
chemical_list: D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D003281:Contraceptives, Postcoital; D004338:Drug Combinations; D004967:Estrogens; D011453:Prostaglandins; D011374:Progesterone