title: Pitfalls in contraception.
mesh_terms: D000568:Amenorrhea / Q000139:chemically induced; D003267:Contraception; D003274:Contraceptive Devices, Female; D003276:Contraceptives, Oral / Q000009:adverse effects; D011307:Drug Prescriptions; D005260:Female; D006801:Humans; D007433:Intrauterine Device Expulsion; D007434:Intrauterine Devices / Q000009:adverse effects; D012252:Natural Family Planning Methods; D000292:Pelvic Inflammatory Disease / Q000209:etiology; D011247:Pregnancy; D014622:Vaginal Creams, Foams, and Jellies
chemical_list: D003276:Contraceptives, Oral; D014622:Vaginal Creams, Foams, and Jellies