1. America's children: key national indicators of well-being, 2005;Federal Interagency Forum on Child and Family Statistics,2005
2. Preliminary births for 2004. Health E-stats;Hamilton,2004
3. Estimated pregnancy rates for the United States, 1990–2000: an update;Ventura;Natl Vital Stat Rep,2004
4. Why is teenage pregnancy declining? The roles of abstinence, sexual activity and contraceptive use, Occasional Report. No 1;Darroch,1999
5. Births: final data for 2003;Martin;Natl Vital Stat Rep,2005