Obese women are more likely to be delivered by cesarean than normal weight women and are at increased risk for operative morbidity including wound complications. Negative pressure wound therapy (NPWT) has been shown to improve wound healing, decrease the rate of surgical site infection, sero-hematoma formation, and reoperation rates. The potential benefit of NPWT in high-risk wounds after cesarean delivery is unclear. Investigators propose conducting a single-site randomized controlled trial to examine the efficacy of NPWT after cesarean delivery in morbidly obese women (BMI ≥ 40 kg/m2).