title: Suppression of serum testosterone concentrations in men by an oral contraceptive preparation.
mesh_terms: D000328:Adult; D003277:Contraceptives, Oral, Combined / Q000494:pharmacology; D004997:Ethinyl Estradiol / Q000494:pharmacology*; D006801:Humans; D008297:Male; D009644:Norgestrel / Q000494:pharmacology*; D013739:Testosterone / Q000097:blood*
chemical_list: D003277:Contraceptives, Oral, Combined; D009644:Norgestrel; D013739:Testosterone; D004997:Ethinyl Estradiol