[Contraceptive drugs].
D003276:Contraceptives, Oral / Q000009:adverse effects / Q000138:chemical synthesis*; D006801:Humans; D009640:Norethindrone / Q000138:chemical synthesis; D011155:Population Control; D011374:Progesterone / Q000138:chemical synthesis; D012494:Sampling Studies
D003276:Contraceptives, Oral; D011374:Progesterone; D009640:Norethindrone
I farmaci contracettivi.