Predictive Value of Bishop Score, Cervical Length and Head–Perineal Distance for the Success of Vaginal Delivery in Primigravida with Premature Rupture of Membrane

Background: Induction of labor is indicated when benefits to the mother or the fetus outweigh those of continuing the pregnancy including cases of post-term pregnancy, preeclampsia or fetal growth restriction. The aim of this study: was to analyze the efficacy of ultrasonography evaluation of the Head-Perineum Distance in predicting the likelihood of a successful vaginal birth before inducing labor. Methods: This prospective observational study was carried out on 120 pregnant patients aged from18 to 32 years old, singleton pregnancy, primigravida, 36–41 weeks gestation, living fetus, cephalic presentation, preinduction reassuring non stress test and premature rupture of membranes (PROM). Foetal Head-Perineum Distance (FHPD) was measured by a transpernial ultrasound. Results: An ultrasound measurement of the Foetal Head-Perineum Distance showed a strong positive connection with both effective induction and the likelihood of a cesarean section. The Bishop score and head perineal distance exhibited significant differences between the two groups. The cervical length did not show a statistically significant difference between the two groups. The predictability of FHPD was superior in all respects when compared to Bishop's score and cervical length. Conclusions: The foetal head - perineum distance is reliable method in predicting successful vagina delivery. Ultrasound examination is simple, non-invasive, and tolerated by women than pelvic examination.