Antiprogestins: prospects for a once-a-month pill.
D002986:Clinical Trials as Topic; D003276:Contraceptives, Oral; D004963:Estrenes; D005260:Female; D006801:Humans; D015735:Mifepristone; D011247:Pregnancy; D011374:Progesterone / Q000037:antagonists & inhibitors; D011372:Progestins / Q000037:antagonists & inhibitors*
D003276:Contraceptives, Oral; D004963:Estrenes; D011372:Progestins; D015735:Mifepristone; D011374:Progesterone