title: Risk factors for ectopic pregnancy.
mesh_terms: D002690:Chlamydia Infections / Q000150:complications; D002692:Chlamydia trachomatis; D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000209:etiology*; D012307:Risk Factors; D012488:Salpingitis / Q000382:microbiology