1. By the Numbers: The Public Costs of Teen Child-Bearing;Hoffman,2006
2. Emerging Answers 2007: Research Findings on Programs to Reduce Teen Pregnancy and Sexually Transmitted Diseases;Kirby,2007
3. Teenagers in the United States: sexual activity, contraceptive use, and childbearing, 2006–2010;Martinez;Vital Health Stat,2010
4. Interventions for preventing unintended pregnancies among adolescents;Oringanje;Cochrane Database Syst Rev,2007