Comparison of Trans-Vaginal Ultrasound Measurement of Cervical Length & Bishop Scoring in Prediction of Success of Induction of Labor in Post-Term Pregnancy

Background: Labor is a process of the fetus movement from the intrauterine to the extrauterine area; the process was named as the diagnosis clinic. It is an initial as well as a permanent contraction to produce the leveling and clinical dilatation which is connected to each other. The exact mechanism responsible for this process has been not fully understood yet.Objectives: To compare between transvaginal ultrasonographic measurement of cervical length and Bishop’s Score in prediction of successful induction of labor in post term pregnancies.Patients and methods: The study had been conducted at Obstetrics and Gynecology Department, Al-AzharUniversityHospital after the approval of research and ethics committee. This observational study included 80 pregnant women from the antenatal care clinic of Al-HusseinUniversityHospital during the period between January 2021 till July 2021.Result: Cervical length was significantly lower in successful induction patients compared to failure induction, while Bishop score was significantly higher in successful induction patients compared to failure induction. Mean induction-to-delivery interval was 6.72 ± 18.34 hours. Most of the patients underwent vaginal delivery (86.2%), while only 13.8% of the patients.Conclusion: Success of labor induction in women undergoing induction due to prolonged pregnancy can be highly predicted by transvaginal sonography of cervical length as it is more objective and accurate than Bishop Score. The 31.2 mm cut-off point for cervical length was the best predictor of vaginal delivery.