Incidence of trophoblastic disease: increased rate in youngest age group.
D000032:Abortion, Therapeutic; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D005260:Female; D006801:Humans; D008423:Maternal Age; D010298:Parity; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D014327:Trophoblasts; D014481:United States