http://www.aafp.org/afp/2007/0315/p875.html loss of more than 500 milliliters of blood Anderson 2007 Bimanual compression http://www.aafp.org/afp/2007/0315/p875.html pitocin Postpartum hemorrhage http://www.aafp.org/afp/2007/0315/p875.html most common cause of maternal mortality 18 percent oxytocin is the first line of treatment Prevention And Management Of Postpartum Hemorrhage