 Enrolled subjects who go on to have a cesarean delivery will be studied using ExSpiron Respiratory Motion, Inc., Waltham, MA, a FDA-approved, non-invasive respiratory volume monitor for 24 hours. The monitor has three adhesive pads that attach to the chest wall and a cord that attaches to the monitoring device, similar to an electrocardiogram. The monitor can be detached and the study suspended when patients ambulate to the restroom, and should not interfere with breastfeeding. The monitor will be connected to the patient in the pre-operative holding area, and the monitor will be calibrated with baseline spirometry measurements using a Wright spirometer over one minute. The subject will wear the device for the duration of the surgery, in the recovery room, and for 24 following surgery. The non-invasive respiratory volume monitor will be collected by study personnel at the conclusion of the 24 hours, and no data collected from the monitor will be used for clinical decision-making. Standard of care will be followed for the antepartum, intrapartum and postpartum management of those patients. Patients will continue to be monitored using the investigators standard protocol for patients who have received neuraxial morphine which consists of continuous monitoring for 2 hours, followed by monitoring every 2 hours for 24 hours of the following: vital signs, oxygen saturation, respiratory rate, pain score and sedation score. The investigators also have nursing standing orders for naloxone administration for respiratory rate 8 breathsmin or Richmond Agitation Sedation Scale RASS -3, together with immediate notification of medical staff, as well an order to notify medical staff for oxygen saturation 90 or RASS -2. 