Manipulation of the menstrual cycle.
D003270:Contraceptive Agents / Q000494:pharmacology*; D003277:Contraceptives, Oral, Combined / Q000494:pharmacology; D003338:Corpus Luteum / Q000502:physiology; D005260:Female; D005498:Follicular Phase; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects; D008183:Luteal Phase; D008598:Menstruation / Q000187:drug effects*; D010053:Ovary / Q000187:drug effects; D014599:Uterus / Q000187:drug effects
D003270:Contraceptive Agents; D003277:Contraceptives, Oral, Combined