(Am J Obstet Gynecol. 2017;216(2):165.e1–165.e8)
Complete uterine rupture is a rare peripartum complication that is often associated with catastrophic outcomes for both mother and child. However, there is a lack of accurate knowledge about its risk factors, due in part to the small size and limited time interval of most previous studies, as well as the use of international coding that was unable to differentiate between complete and partial uterine rupture. Because a scarred uterus from previous cesarean delivery (CD) significantly increases the risk of uterine rupture—which means that complete uterine rupture is expected to increase as the rate of cesarean delivery increases—it is vitally important to gain more accurate knowledge of the risk factors for complete uterine rupture. The present population-based registry study sought to identify risk factors for complete uterine rupture during labor in a validated population in Norway that gave birth during the period of 1967 to 2008.