title: New medicines; potency, selectivity and the pill.
mesh_terms: D000818:Animals; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003277:Contraceptives, Oral, Combined; D003280:Contraceptives, Oral, Synthetic / Q000494:pharmacology*; D004848:Epithelium / Q000187:drug effects; D004997:Ethinyl Estradiol / Q000494:pharmacology; D005260:Female; D005298:Fertility / Q000187:drug effects*; D006801:Humans; D008297:Male; D009644:Norgestrel / Q000009:adverse effects / Q000494:pharmacology*; D051381:Rats; D014621:Vagina / Q000187:drug effects
chemical_list: D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003280:Contraceptives, Oral, Synthetic; D009644:Norgestrel; D004997:Ethinyl Estradiol