1. Healthy People 2010. http://www.healthypeople.gov/ . Accessed March 17, 2010.
2. Brown, S. S., & Eisenberg, L. (Eds.). (1995). The best intentions: Unintended pregnancy and the well-being of children and families (p. 81). Washington (DC): National Academies Press.
3. Martinez, G. M., Mosher, W. D., Abma, J. C., & Jones, J. (2005). Fertility, family planning, and reproductive health of U.S. women: Data from the 2002 National Survey of Family Growth. National Center for Health Statistics. Vital Health Statistics, 23(25), 1–160.
4. Finer, L. B., & Henshaw, S. K. (2006). Disparities in the rates of unintended pregnancy in the United States, 1994 and 2001. Perspectives on Sexual and Reproductive Health, 38, 90–96.
5. Trussell, J. (2007). The cost of unintended pregnancy in the United States. Contraception, 75, 168–170.