 This is a practical study using standard clinical practice methods to assess vital signs. Maternal vital signs blood pressure, heart rate will be collected in the left lateral recumbent position after an initial 5 minute period without activity. Automated devices will be used to assess blood pressure and pulse pressure at the following times: on admission, immediately prior to infusion of IV fluid bolus in preparation for epidural placement, immediately following IV fluid bolus infusion, at epidural test dose T0, every 5 minutes for 30 minutes T0 to T30, and then every 10 minutes for the next 30 minutes T30 to T60. 