Birth control: U. S. research advances despite papal edict.
D002410:Catholicism; D003267:Contraception; D003338:Corpus Luteum / Q000502:physiology; D010064:Embryo Implantation; D005187:Fallopian Tubes / Q000502:physiology; D005260:Female; D005306:Fertilization; D007434:Intrauterine Devices; D011155:Population Control; D012071:Religion and Sex; D012106:Research; D014481:United States