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Prolonged Second Stage: What Is the Optimal Length?

Alexis C Gimovsky1, Vincenzo Berghella2

  • 1Assistant Professor, Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, George Washington University School of Medicine and Heath Sciences, Washington, DC.

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Extending the second stage of labor for nulliparous women with epidurals can decrease cesarean delivery rates without increasing maternal or neonatal risks. Over 80% achieve vaginal birth, even after 3 hours.

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Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine

Background:

  • Prolonged second stage of labor in nulliparous women receiving epidural anesthesia presents a clinical challenge.
  • Current management strategies are debated regarding their impact on cesarean delivery rates and maternal/neonatal outcomes.

Purpose of the Study:

  • To review current literature on the management and risks associated with a prolonged second stage of labor in nulliparous women with epidural anesthesia.
  • To assess the incidence of cesarean delivery and associated maternal and neonatal outcomes.

Main Methods:

  • A narrative review of existing literature was conducted.
  • Evaluated studies focused on cesarean delivery rates, maternal complications, and neonatal risks in the context of prolonged second stage of labor.

Main Results:

  • Approximately 11.5% of nulliparous women with epidurals experience a prolonged second stage, with over 80% achieving vaginal delivery.
  • One randomized controlled trial indicated that extending the second stage decreased cesarean delivery by 55% without significant adverse effects.
  • Favorable outcomes were observed in women with occiput anterior fetal position or spontaneous labor onset, with significantly reduced cesarean rates.

Conclusions:

  • A high likelihood of vaginal delivery (over 80%) persists beyond 3 hours in the second stage for nulliparous women with epidurals.
  • While risks appear minimal, further investigation through larger, well-designed studies is warranted to fully explore maternal and neonatal risks.