Adolescent pregnancy revisited.
D000029:Abortion, Legal; D000293:Adolescent; D000328:Adult; D001723:Birth Rate; D003267:Contraception; D005193:Family Planning Services; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D008404:Massachusetts; D008423:Maternal Age; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology; D012306:Risk; D012736:Sex Education; D013223:Statistics as Topic; D013332:Student Dropouts