title: Unanswered questions on ectopic pregnancy.
mesh_terms: D000367:Age Factors; D004739:England; D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000453:epidemiology* / Q000209:etiology; D014852:Wales