7Lumbiganon P, Laopaiboon M, Gulmezoglu AM, et al. Methodofde- livery and pregnancy outcomes in Asia: the WHO global survey on maternal and perinatal health 2007 -2008 [ J ]. The Lancet, 2010,375 (9713) :490.
813oulet bL,alihu HM, Alexander Gl.. Mode ot delivery and the sur- vival of macrosomie infants in the United states 1990-1999 [ J ]. Birth ,2006,33 (4) :278-283.
9Maier B, Georgoulopoulos A, Zajc M, et al. Fetal outcome for infants in breech by method of delivery:experiences with a stand-by service system of senior obstetricians and women' schoices of mode of deliv- ery[J]. J Perinat Med,2011,39(4) :385-390.
10Stohl HE, Szymanski LM, Althaus J. Vaginal breech delivery in very low birth weight(VLBW) neonates : experience of a single center[ J]. .1 Perinat Med.2011 _39(4" :379-383.