Intraoperatively, both groups will receive combined spinal-epidural anesthesia in the usual manner. All standard monitoring will be applied and vital signs recorded for the entirety of the procedure. The number and dose of ephedrine or phenylephrine boluses and the number and severity of nausea episodes (using a Visual Analog Scale (VANS)) and number of vomiting episodes will be noted. In addition the following will be recorded: if uterus was exteriorized, any medications used by the anesthesiologist (other than ephedrine and phenylephrine), and estimated blood loss.