Over a one-year period, patients with a previous cesarean section were screened in the authors' clinic and instructed regarding the risks and benefits of trial of labor after cesarean section. Patients with a previous lower uterine segment transverse cesarean section or previous lower uterine segment vertical cesarean section, regardless of number, were allowed to undergo a trial of labor, obstetric conditions permitting. Exclusions included a previous classical section, any incision suspected of extending into the upper segment, a prior “T” incision, or a failed trial of labor after a cesarean section previously. Patients were encouraged to come to the hospital early in labor to permit early placement of a fetal scalp electrode and internal pressure catheter. Blood was made available. Oxytocin was used for the usual obstetric indications and epidural anesthesia employed upon request. Uterine ruptures were defined as those requiring surgical intervention and dehiscences were those not requiring intervention and noted postpartum.
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Stovall et al. (1988) studied this question.