Amniotomy versus Deferral at  cm during Standardized Induction of Labor: A Propensity Score-Matched Study

= 0.002), a finding consistent across parity. Once censored for CD, these findings remained significant (hazard ratio [HR] = 1.17, 95% confidence interval [CI]: [1.04-1.31]). There were no differences in CD or morbidity.Even when matching for the induction course prior to the first examination at ≥4 cm, AROM at ≥4 cm is associated with shortened time to delivery without increasing maternal or neonatal morbidity. · Early amniotomy has been variably defined in prior literature.. · No prior studies evaluate early AROM within a standardized induction protocol.. · AROM at first examination ≥4 cm shortens the time to delivery regardless of parity.. · AROM at first examination ≥4 cm is not associated with differences in morbidity..