First and Second Stage Risk Factors Associated with Perineal Lacerations

To determine intrapartum factors associated with perineal laceration at delivery. This was a planned secondary analysis of a multicenter randomized clinical trial of delayed versus immediate pushing among term nulliparous women in labor with neuraxial analgesia conducted in the United States. Intrapartum characteristics were extracted from the medical charts. The primary outcome was perineal laceration, defined as second degree or above, characterized at delivery in women participating in longer term pelvic floor assessments post-delivery. Multivariable logistic regression was used to refine risk estimates while adjusting for randomization group, birth weight, and maternal age. Among the 941 women participating in the pelvic floor follow-up, 40.6