A Retrospective Comparative Series Comparing Monarc and Sparc Suburethral Slings. Introduction and Hypothesis: There are a number of suburethral slings used in current practice to treat female urinary incontinence. To date there has been a lack of larger comparative series. This paper aims to evaluate the effectiveness and complications of two types of suburethral sling. Methods: A retrospective comparative series comparing 113 consecutive Sparcsuburethral slings with 112 consecutive Monarc slings. Results: The success rate of SparcvsMonarc was similar at 6 weeks (96.1% vs 94.2%, NS) and at 6 months (96.0% vs 92.6%, NS). The Monarc procedure had less intraoperative bladder fenestrations & less postoperative urgency. Conclusions: Both procedures had a similar success rate, while the Monarc had less complications. Brief Summary: Both procedures had a similar success rate, while the Monarc had less complications of intraoperative bladder fenestration & postoperative urgency.