1. Youth Risk Behavior Surveillance—United States, 2011;Centers for Disease Control and Prevention (CDC);MMWR,2012
2. Birth rates for U.S. teenagers reach historic lows for all age and ethnic groups;Hamilton,2012
3. CDC. Diagnoses of HIV infection and population among young adults aged 20-24 years, by race/ethnicity, 2010-46 states. Available at: http://www.cdc.gov/hiv/topics/surveillance/resources/slides/adolescents/index.htm. Accessed on January 31, 2013.
4. CDC Division of Adolescent and School Health. Youth online: High school YRBS. Available at: http://apps.nccd.cdc.gov/youthonline/App/Default.aspx. Accessed January 31, 2013.
5. Sexual activity among girls under age 15: Findings from the National Survey of Family Growth;Flanigan,2003