Unplanned adolescent pregnancy: challenge for the 1980's.
D000293:Adolescent; D001741:Black or African American / Q000523:psychology; D003268:Contraception Behavior; D005260:Female; D006801:Humans; D011247:Pregnancy; D011253:Pregnancy in Adolescence; D012736:Sex Education; D012725:Sexual Behavior; D012945:Social Values; D014481:United States