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Related Concept Videos

Obesity01:24

Obesity

The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...

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Updated: May 25, 2026

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

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Published on: June 6, 2020

Does increasing body mass index affect cerclage efficacy?

S H Poggi1, N A Vyas, J C Pezzullo

  • 1Perinatal Diagnostic Center, Inova Alexandria Hospital, Alexandria, VA 22304, USA. sarah.poggi@inova.org

Journal of Perinatology : Official Journal of the California Perinatal Association
|February 4, 2012
PubMed
Summary
This summary is machine-generated.

Higher body mass index (BMI) in patients with cervical insufficiency (CI) undergoing cerclage is linked to earlier delivery. This inverse relationship between BMI and gestational age (GA) at delivery was unexpected.

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Laparoscopic Extracorporeal Knot-Tying for Uterine Vessel Occlusion during Hysterectomy with Cervical Cerclage in Large Uteri

Published on: September 12, 2025

Area of Science:

  • Maternal-fetal medicine
  • Obstetrics
  • Reproductive health

Background:

  • Cervical insufficiency (CI) is a condition where the cervix dilates prematurely, leading to preterm delivery.
  • Cerclage is a surgical procedure to reinforce a weakened cervix during pregnancy.
  • The impact of maternal body mass index (BMI) on pregnancy outcomes in women with CI undergoing cerclage is not fully understood.

Purpose of the Study:

  • To investigate the association between body mass index (BMI) and gestational age (GA) at delivery among patients with cervical insufficiency (CI) who underwent cerclage.
  • To determine if maternal weight status influences pregnancy duration in this specific high-risk obstetric population.

Main Methods:

  • Retrospective analysis of 168 patients with singleton gestations and a history of CI undergoing cerclage.
  • Patients were categorized into obese and normal-weight groups.
  • Univariate and multivariate logistic regression analyses were used to compare obstetrical outcomes and assess the relationship between BMI and GA.

Main Results:

  • Obese patients had a significantly higher rate of prior preterm delivery (<35 weeks) compared to normal-weight patients (44% vs 9%).
  • Mean gestational age (GA) at delivery was significantly lower in obese patients (32.6±7.0 weeks) versus normal-weight patients (37.2±3.4 weeks).
  • After adjusting for confounders, BMI remained a significant predictor of prematurity, with each unit increase in BMI associated with a 1-day reduction in GA at delivery (P=0.03).

Conclusions:

  • An inverse correlation was observed between maternal BMI and gestational age at delivery in patients with CI receiving cerclage.
  • Higher BMI was associated with earlier delivery, which is contrary to the generally observed protective effect of obesity against spontaneous preterm birth.