US adolescent pregnancy rates: declining, but more progress is needed: editorial review.
Hillard
Paula J Adams
PJ
D000293:Adolescent; D003267:Contraception / Q000706:statistics & numerical data; D003268:Contraception Behavior; D005260:Female; D006801:Humans; D011247:Pregnancy; D018873:Pregnancy Rate / Q000639:trends*; D014481:United States / Q000453:epidemiology