title: Epidemiology of ectopic pregnancy.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D007902:Length of Stay; D008393:Marriage; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000453:epidemiology* / Q000209:etiology / Q000401:mortality; D044469:Racial Groups; D014481:United States