Comparison of the Frequency of Failed Induction of Labor in Obese Versus Non-Obese Women with Post-Date Pregnancy

Masooda Rasheed; Sobia Nawaz  Malik; Sara Malik; Shahla Manzoor; Hina Hanif Mughal; Tabinda khalid

Masooda Rasheed
Sobia Nawaz Malik
Sara Malik
Shahla Manzoor
Hina Hanif Mughal Associate Professor, Head of Radiology department, Benazir Bhutto Hospital, Rawalpindi
Tabinda khalid

Keywords: Post-Date Pregnancy, Labor Induction, Maternal Obesity, Failed Induction, Cervical Dilatation

Abstract

Abstract : The objective of this study was to compare the frequency of failed induction of labor in obese and non-obese women with post-date pregnancies.

Materials and Methods: This prospective coho took place at the Department of Obstetrics and Gynecology in the District Headquarter (DHQ) Hospital Rawalpindi, spanning from January 2020 to December 2020. This study involved 128 pregnant women aged between 18-35 years, presenting with post-date pregnancy (≥42 weeks of gestation), who were categorised as cases (BMI ≥30 Kg/m²) and controls (BMI <30 Kg/m²). The outcome variable was the failure of labor induction, labeled as such if the woman failed to deliver vaginally within 24 hours of induction or if the trial was terminated due to fetal distress. The frequency of failed induction was compared between obese and non-obese women, and relative risk were estimated.

Results: The mean age of the patients was 25.65±3.56 years, while the mean gestational age was 43.27±0.99 weeks. The Bishop score ranged from 1 to 7 with a mean of 3.95±1.90.65 (50.8%) women had a Bishop Score ≤3. Induction of labor failed in 58 (45.3%) women with post-date pregnancy. The frequency of induction failure was significantly higher among obese women compared to non-obese women (59.4% vs. 31.3%; p-value=0.001; 95% CI RR=1.90).

Conclusion: In the present study, maternal obesity was associated with increased risk of induction failure in pregnant women with post-date pregnancy.