title: Ectopic pregnancy.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000453:epidemiology* / Q000209:etiology; D012306:Risk; D012488:Salpingitis / Q000453:epidemiology; D014481:United States