title: Trends in ectopic pregnancies: United States 1970 to 1985.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007902:Length of Stay / Q000639:trends*; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000453:epidemiology / Q000401:mortality; D013997:Time Factors; D014481:United States