title: Effect of d-norgestrel on early pregnancy in rats.
mesh_terms: D000818:Animals; D003281:Contraceptives, Postcoital; D004305:Dose-Response Relationship, Drug; D005260:Female; D009644:Norgestrel / Q000494:pharmacology*; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000187:drug effects*; D051381:Rats; D013997:Time Factors
chemical_list: D003281:Contraceptives, Postcoital; D009644:Norgestrel