Chen HY, et al. - In this cohort study, researchers compared composite maternal or neonatal morbidity among low-risk, full-term women, using the U.S. vital statistics datasets (2011–2015). During the study interval, 19.8 million live births were identified, of whom, 3.3 million met inclusion criteria: 43.5% were delivered at 39 weeks of gestation, 41.4% at 40 weeks, and 15.1% at 41 weeks. Outcomes revealed an increase in the rate of composite neonatal and maternal morbidity, albeit modest, from 39 through 41 weeks of gestation among low-risk nulliparous women.