Pregnancy among single American teen-agers.
D000028:Abortion, Induced; D000293:Adolescent; D003267:Contraception; D005193:Family Planning Services; D005260:Female; D005313:Fetal Death; D006801:Humans; D007086:Illegitimacy; D007883:Legislation, Medical; D008393:Marriage; D011247:Pregnancy; D011275:Pregnancy, Unwanted; D012847:Single Person; D014481:United States