American journal of obstetrics and gynecology
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Am. J. Obstet. Gynecol. · Oct 1993
Randomized Controlled Trial Comparative Study Clinical TrialThe effect of intrapartum epidural analgesia on nulliparous labor: a randomized, controlled, prospective trial.
Our purpose was to determine the effect of epidural analgesia on nulliparous labor and delivery. ⋯ In a randomized, controlled, prospective trial epidural analgesia resulted in a significant prolongation in the first and second stages of labor and a significant increase in the frequency of cesarean delivery, primarily related to dystocia.