1. Fertility, family planning, and reproductive health of U.S. women: data from the 2002 National Survey of Family Growth;Chandra;Vital Health Stat,2005
2. Essential reproductive medicine;Carr,2005
3. Expanded health data from the new birth certificate, 2004;Martin;Natl Vital Stat Rep,2007
4. Births: final data for 2006;Martin;Natl Vital Stat Rep,2009
5. Assisted reproductive technologies: estimates of their contribution to multiple births and newborn hospital days in the United States;Wilcox;Fertil Steril,1996