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Normal labor curve in twin gestation.

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Twin labor progresses slower than singleton labor, particularly the active and second stages. Epidural use further slows twin labor, potentially impacting cesarean delivery rates.

Keywords:
active phaseepidurallaborlabor curvepartogramsecond stagetwin

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Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Labor and Delivery Management

Background:

  • Failure to progress is a primary reason for cesarean delivery in twin gestations.
  • Current labor assessment in twin gestations relies on singleton labor curves, which may not be accurate.

Purpose of the Study:

  • To develop a partogram for twin deliveries that accurately reflects labor progression.
  • To establish customized labor curves for various subgroups of twin labors.

Main Methods:

  • Retrospective cohort analysis of 1375 twin and 142,659 singleton deliveries across three medical centers (2003-2017).
  • Inclusion criteria: twin gestations ≥34 weeks, cephalic presenting twin, ≥2 cervical exams. Exclusions: elective cesarean, major fetal anomalies, fetal demise.
  • Statistical analysis included chi-square tests, Student t-tests, and Mann-Whitney U tests using Python and SPSS.

Main Results:

  • Twin labors showed significantly longer active phase durations compared to singleton labors (2+ hours longer in nulliparous, 3.5+ hours longer in multiparous).
  • Cervical dilation rate was slower in twin deliveries (1.89 cm/h vs. 2.48 cm/h in singletons).
  • Epidural analgesia and a longer second stage of labor were observed in twin deliveries.

Conclusions:

  • Twin labors exhibit slower progression in both active and second stages compared to singleton labors.
  • Epidural analgesia further impedes labor progression in twin gestations.
  • Utilizing these findings in clinical practice may reduce cesarean delivery rates for protracted twin labors.