1. Abma, J. C., Martinez, G. M., & Copen, C. E. (2010). Teenagers in the United States: Sexual activity, contraceptive use, and childbearing, National Survey of Family Growth 2006–2008. National Center for Health Statistics. Vital and Health Statistics, 23(30).
2. American College of Obstetricians and Gynecologists (ACOG). (2009). Opinion no 450: Increasing use of contraceptive implants and intrauterine devices to reduce unintended pregnancy. Obstetrics and Gynecology, 114, 1434–1438.
3. Arnett, J. J. (2000). Emerging adulthood, a theory of development from the late teens through the twenties. American Psychologist, 55(5), 469–480.
4. Aruda, M. (2007). Diagnosing and tracking pregnant teens: Development of a quality improvement project. Women’s Health Care, 6(9), 25–33.
5. Aruda, M. M. (2011). Predictors of unprotected intercourse for female adolescents measured at their request for a pregnancy test. Journal of Pediatric Nursing, 26, 216–223.