Abstract

References
1.
McDowell
MM
Wang
C-Y
Kennedy-Stephenson
J.
Breastfeeding in the United States: Findings from the National Health and Nutrition Examination Survey, 1999 −2005. NCHS Data Briefs, No. 5. Hyattsville (MD): National Center for Health Statistics; 2008.
2.
Ventura
S
Abma
J
Mosher
W.
Estimated pregnancy rates by outcome for the United States, 1990 −2004. Natl Vital Stat Rep 2008 Apr 14;56 :1 –26 .
3.
Hing
E
Burt
C.
Characteristics of office-based physicians and their medical practices: United States, 2005 −2006. Vital Health Stat 13 2002(168).
