Factors Associated with the Failed Induction of Labour in Post-Term Pregnancy at a Tertiary Care Hospital in Karachi, Pakistan

Abstract

Objective: To determine the factors associated with failed induction of labour in post-term pregnancies attending a tertiary care hospital in Karachi, Pakistan.
Mehtods: This cross-sectional study was conducted at the Department of Gynecology and Obstetrics, Unit II, Civil Hospital, Karachi. During January to July, 2016. Women with a gestational age of 40 weeks + 6 days to 41weeks + 0 days were included in the study. Obstetric history, maternal age, BMI, gestational age, Bishop score, induction to delivery interval and mode of delivery were noted. Failed induction of labour was considered when patients delivered abdominally. Descriptive statistics were
calculated and chi-square test was applied post stratification where p-value < 0.05 was considered statistically significant.
Results: 140 women met the inclusion criteria. The mean age of study subjects was 32.1 ± 2.9 years. Induction of labour failed in 78.6% of patients. Prolonged latent phase of labour was observed in 27.9% and a prolonged 2nd stage of labour obsereved in 17.1%. A Bishop score > 5 was in 81.4%. BMI > 24.9 was in 47.1%. Spontaneous rupture of membrane (SROM) was in 27.1%.
Conclusion: Induction of labour failed in 78.6% of post-term pregnancies in our study. A prolonged latent phase of the first stage of labour showed a significant association with failed induction of labour.