 We propose a prospective, randomized, double blind, placebo controlled trial with 120 subjects recruited from the WRNMMC Urogynecology Clinic to study post-operative efficacy of Exparel for pain control in patients undergoing Urogynecology surgery involving the posterior vaginal wall. Subjects will be randomized to receive either 20mL of extended-release bupivacaine or 20mL placebo. 