Rosenbloom JI, Rottenstreich A, Yagel S, et al. - Researchers aimed to determine the length of the second stage of labor in a large contemporary cohort of women with varying obstetrical histories. In addition, they explored the factors linked with the length of the second stage. They conducted a retrospective cohort study of 100,759 deliveries. Per observations, there was considerably longer median length of the second stage of labor in nulliparous women than described historically and it was relatively shorter in parous women. Nulliparous women with an epidural had the longest second stage of labor (median 96 minutes, interquartile range 53-142 minutes), which was 57 minutes longer than in nulliparous women without an epidural. Women delivering preterm had significantly shorter length of the second stage compared with women delivering at term. The length of the second stage was noted to be independently positively associated with birthweight, previous cesarean delivery, gestational age, use of epidural analgesia, and induction of labor, while negatively associated with parity.