 Women meeting eligibility criteria will be recruited and randomized in a 1:1 ratio into two study groups: standard IV fluid bolus prior to epidural placement 500 mL Lactated Ringers or volume replacement IV fluid bolus of 1500mL Lactated Ringers. IV fluid boluses will be infused over 30 minutes and administered within 1 hour of epidural placement. A third group will also be recruited as a control, which will include women with a pulse pressure 45 on admission and otherwise meet the aforementioned inclusionexclusion criteria. The control group will receive the standard preload bolus of 500 mL prior to epidural placement. 