The TAP block shall be performed in the fashion described by Carney et. al (5). in the region of the triangle of Petit located at the superior aspect of the iliac crest, using a 22g regional block needle, utilizing the 2 pop technique(2) and needle tip position verified by ultrasound imaging. The investigator will confirm placement of the injectate in the fascial plane by initial injection of a small amount of the local anesthetic drug followed by injection of the rest of the dose with ultrasound verification of anesthetic deposition between the internal oblique and transversus abdominis. The ultrasound image will be printed and included with the study data.. The other side will receive a sham needle placement without medication injection. Because this block is performed before regression of spinal anesthesia, it causes no pain to the subject.