The study will investigate the difference in perceived pain from IUD insertion, comparing paracervical block with lidocaine to a placebo (bacteriostatic saline) block, among nulliparous and functionally nulliparous women. The investigators plan a double-masked, placebo controlled, randomized clinical trial. The investigators anticipate that among patients who have not had a previous vaginal delivery, the pain associated with IUD insertion will be significantly decreased after administration of a 15 mL 1% lidocaine paracervical block compared to patients who receive 15 mL of bacteriostatic saline (placebo).
Despite the high efficacy of intrauterine devices (IUDs), some women choose not to receive IUDs secondary to the pain associated with insertion. Nulliparous women may be especially susceptible to procedure-related pain from IUD insertion. This study will investigate the difference in perceived pain from IUD insertion, comparing local anesthesia to a placebo, among women who have not had a vaginal delivery before. The investigators anticipate that among women who have not had a previous vaginal delivery, the pain associated with IUD insertion will be significantly decreased after administration of local anesthesia.