Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics

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Referenz

Santelli JS, Lindberg LD, Finer LB, Singh S.
Explaining recent declines in adolescent pregnancy in the United States: the contribution of abstinence and improved contraceptive use.

Am J Public Health 2007;
97 (1) 150-156

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