title: Studies on the interactions of ethynyl oestradiol and norgestrel.
mesh_terms: D000818:Animals; D003276:Contraceptives, Oral / Q000494:pharmacology; D004336:Drug Antagonism; D004357:Drug Synergism; D004997:Ethinyl Estradiol / Q000494:pharmacology*; D005260:Female; D005298:Fertility; D051379:Mice; D009929:Organ Size; D010053:Ovary; D011372:Progestins / Q000494:pharmacology*; D051381:Rats; D012725:Sexual Behavior; D014599:Uterus / Q000254:growth & development
chemical_list: D003276:Contraceptives, Oral; D011372:Progestins; D004997:Ethinyl Estradiol