title: Contraception.
authors.affiliation: Pennsylvania Hospital, Philadelphia.
authors.forename: W W
authors.initials: WW
authors.lastname: Beck
mesh_terms: D000367:Age Factors; D003267:Contraception / Q000379:methods; D003274:Contraceptive Devices, Female; D003276:Contraceptives, Oral / Q000008:administration & dosage / Q000009:adverse effects; D003281:Contraceptives, Postcoital / Q000008:administration & dosage; D005260:Female; D007987:Gonadotropin-Releasing Hormone / Q000008:administration & dosage; D006801:Humans; D007434:Intrauterine Devices; D016912:Levonorgestrel; D009644:Norgestrel / Q000008:administration & dosage
chemical_list: D003276:Contraceptives, Oral; D003281:Contraceptives, Postcoital; D007987:Gonadotropin-Releasing Hormone; D009644:Norgestrel; D016912:Levonorgestrel