Teenage pregnancy.
D000028:Abortion, Induced; D000022:Abortion, Spontaneous; D000293:Adolescent; D003267:Contraception; D005260:Female; D006801:Humans; D007086:Illegitimacy; D008393:Marriage; D008423:Maternal Age; D011247:Pregnancy; D012736:Sex Education; D014481:United States