4Sheiner E,Shoham Vardi I ,Hallak M,et al. Placenta previa, obstetric risk factors and pregnancy outcome.J Matem Fetal Med ,2001 Dec, 10(6) :414-419.
5Mazor M,Hershkovitz R, Bashiri A,et al . Meconium stained ammiotic fluid in pretenn delivery is an independent risk factor for perinatal complications . Eur J Obstet Gynecol Repred Biod ,1998 Oct,81(1):9-13.
6Hayashi M, Mori Y, Nogami K, et al. A hypothesis to explain the occurence of inner myometrial laceration causing massive postpartum hemorrhage. Acta Obstet Gynecol Scand, 2000 Feb,79(2) :99-106.
