BirthStats: rates of cesarean delivery, and unassisted and assisted vaginal delivery, United States, 1996, 2000, and 2006.
Menacker
Fay
F
Division of Vital Statistics, National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, Maryland, USA.
Martin
Joyce A
JA
D002585:Cesarean Section / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D036801:Parturition; D011247:Pregnancy; D014481:United States / Q000453:epidemiology; D014620:Vacuum Extraction, Obstetrical / Q000706:statistics & numerical data*