9Khan N, Me Call J. Imaging in vascular disease [J] . Surgery, 2007, 25 (8) : 333.
10Sufang G, Padmadas SS, Fengmin Z et al. Delivery settings and caesare- an section rates in China [ J ] . Bull Word Health Organ, 2007, 85 (10) : 755.
6LUMBIGANON P, LAOPAIBOON M,GULMEZOGLU AM, et al. Method of delivery and pregnancy outcomes in Asia: the WHO global survey on maternal and perinatal health 2007 - 2008 [ J ]. Lancet,2010,375 ( 9713 ) :490 - 499.
7KLEME'ITI R,'CI-IE X, GAO Y, et al. Cesarean section delivery among primiparous women in rural China: an emerging epidemic [J]. Am J Obstet Gynecol,2010,202( 1 ) :65.
8CHIOSSI G,LAI Y, LANDON MB, et al. Timing of delivery and adverse outcomes in term singleton repeatcesarean deliveries[ J]. Obstet Gynecol,2013,121 (3) :561 - 569.
9BAYRAMPOUR H, HEAMAN M. Advanced maternal age and the risk of cesarean birth : a systematic review [ J ]. Birth, 2010,37 (3) :219 -226.
10LEHMANN S, BORDAHL PE, RASMUSSEN SA, et al. Norwegian midwives and doctors have increased cesarean section rates[ J ]. Acta Obstet Gynecol Scand, 2007,86 ( 9 ) : 1087 - 1089.