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

  • Masooda Rasheed senior registrar DHQ HOSPITAL
  • Sobia Nawaz Malik Associate professor HFH
  • Sara Malik Gynecologist Dhq hospital
  • Shahla Manzoor Senior Registrar dhq hospital
  • Hina Hanif
  • Tabinda khalid Senior Registrar Dhq teaching hospital


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.

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

Original Articles