Both groups will have the standard amount of oxytocin given slowly (over a 30 minute period) into the intravenous in their arm (infusion). The amount of oxytocin that is put into the intravenous bag is a normal amount that would be given during cesarean section in any woman not involved in the study and it will be started after the initial injection has been given. The only difference between the two groups is that one group will have an extra dose of oxytocin given directly into the vein via the intravenous while the other will have a saline solution given directly into the vein via the intravenous.