title: Contraception and pelvic inflammatory disease.
mesh_terms: D003267:Contraception; D003276:Contraceptives, Oral / Q000009:adverse effects; D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects; D000292:Pelvic Inflammatory Disease / Q000209:etiology*
chemical_list: D003276:Contraceptives, Oral