2Bai J, Sun Q, Zhai H. Comparison of oxytocin and carbo- prost tromethamine in the prevention of postpartum hem- orrhage in high-risk patients undergoing cesarean delivery [J]. Exp Ther Med, 2014,7( i ) : 46.
3Morey SS.ACOG releases report on risk factors, causes and management of postpartum hemorrhage[J]. Am Faro Phy- sician, 1998,58(4) : 1 002.
4Azar M, Jennifer AH, Lily L, et al. Trends in postpartum hemorrhage from 2000 to 2009 : a population-based study [J]. BMCPregnancy Childbirth,2012,11(12) : 108.