American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2007 > 196 > 3 > 229.e1-229.e4
American Journal of Obstetrics and Gynecology > 2007 > 196 > 5 > 433-444
American Journal of Obstetrics and Gynecology > 2007 > 197 > 3 > 247.e1-247.e5
American Journal of Obstetrics and Gynecology > 2007 > 197 > 3 > 223-228
American Journal of Obstetrics and Gynecology > 2007 > 197 > 3 > 257.e1-257.e8