Nelson DB, et al. - Given the recently published revised guidelines by national organizations for the management of labor stipulating not diagnosing labor arrest unless ≥ 6 cm cervical dilatation had been reached or labor had been stimulated for at least 6 hours, researchers sought to ascertain the cervical dilatation and hours of labor stimulation prior to cesarean delivery for arrest of dilatation. They performed a secondary analysis of a prospective observational study of all primary cesarean deliveries, conducted at 13 university centers comprising the Eunice Kennedy Shriver National Institute for Child Health and Human Development, Maternal-Fetal Medicine Units Network. Fifteen years before the recommendations of the Obstetrics Care Consensus, women undergoing primary cesarean delivery for arrest of dilatation had received bona fide efforts to attain adequate labor consistent with the recommendations of the Consensus. These new recommendations may not modify the cesarean delivery rates as 95% of these women were ≥ 6 cm dilatation or had undergone labor stimulation ≥ 6 hours earlier to cesarean for arrest of dilatation.