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Description
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Related Experiment Video

Updated: Jun 10, 2026

External Cephalic Version: Is it an Effective and Safe Procedure?
08:49

External Cephalic Version: Is it an Effective and Safe Procedure?

Published on: June 6, 2020

Predictors of a successful external cephalic version: a population-based cohort study.

Shan Liu1, Lingyan Chen1, Guilian Liao1

  • 1Department of Obstetrics, Maternity & Child Healthcare Hospital of Longgang District, Shenzhen City (Longgang Maternity and Child Institute of Shantou University Medical College), Shenzhen, China.

BMC Pregnancy and Childbirth
|June 9, 2026
PubMed
Summary

External cephalic version (ECV) success is influenced by several factors. Managing weight gain and monitoring amniotic fluid index are key to improving ECV outcomes for breech presentations.

Keywords:
External cephalic version (ECV)PredictorsRestricted cubic spline (RCS)

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Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Clinical Obstetrics

Background:

  • External cephalic version (ECV) is a procedure to correct breech presentation.
  • Successful ECV can increase the rate of vaginal delivery.

Purpose of the Study:

  • To identify factors affecting ECV success in pregnant women with breech presentation in southern China.
  • To analyze the relationship between specific maternal and fetal factors and ECV outcomes.

Main Methods:

  • A cohort of 484 pregnant women undergoing ECV was studied.
  • Logistic regression and restricted cubic spline (RCS) analyses were employed.
  • Key factors analyzed included amniotic fluid index (AFI) and gestational weight gain.

Main Results:

  • The overall ECV success rate was 75.41%.
  • Excessive pregnancy weight gain (12.0-20.0 kg) was associated with decreased ECV success (OR=1.05).
  • Protective factors for ECV success included shallow breech presentation, single nuchal cord, and higher AFI (13.2-17.0 cm).

Conclusions:

  • Excessive gestational weight gain negatively impacts ECV success.
  • Adequate amniotic fluid index, shallow breech presentation, and single nuchal cord are favorable for ECV.
  • Clinical recommendations include monitoring AFI and controlling weight gain within specific ranges to optimize ECV success rates.