Adolescent pregnancy.
D000029:Abortion, Legal; D000293:Adolescent; D000328:Adult; D003267:Contraception; D005260:Female; D005298:Fertility; D006296:Health Services / Q000600:supply & distribution; D006801:Humans; D007086:Illegitimacy; D007231:Infant, Newborn; D008393:Marriage; D011247:Pregnancy; D011253:Pregnancy in Adolescence; D012725:Sexual Behavior; D012959:Socioeconomic Factors; D014481:United States