First pregnancies to women aged 15-19: 1976 and 1971.
D000028:Abortion, Induced; D000293:Adolescent; D000300:Adoption; D000328:Adult; D001741:Black or African American; D003268:Contraception Behavior; D005114:Extramarital Relations; D005260:Female; D006801:Humans; D007086:Illegitimacy; D008393:Marriage; D010298:Parity; D011247:Pregnancy; D044465:White People