Abstract

Introduction: Induction of labor is a common procedure in modern obstetrics. Studies showed that success of induction is related to maternal age, body mass index, parity, gestational age, cervical dilatation, cervical ripening before induction, and cervical length. This study was performed with aim to investigate the relationship between induction success and Bishop score. Methods: This cross-sectional study was performed on 539 pregnant women referred to Beasat hospital in Sanandaj and were hospitalized for labor induction between 2012- 2013. Data collection tools included a questionnaire containing the questions about demographic characteristics, obstetric history, information about Bishop score, induction of labor, mode of delivery, birth weight and first and fifth minutes Apgar score. Das was analyzed by SPSS software (version 20) and Chi-square test, t-test and logistic regression. P<0.05 was considered significant. Results: There was no significant difference between induction success and Bishop score (P=0.286). There was significant difference between induction success and cervical dilatation (P<0.001), effacement (P=0.004), birth weight, method of induction (P=0.000), and gravidity (P=0.002), but had no difference with fetal decent (P=0.433), maternal age (P=0.433) and parity (P=0.286). A total of 218 women (70.8) were nuliparous and 83 (35.99) multiparous, and 412 women (76.43) had vaginal delivery and the others had cesarean due to failure of induction. Based on logistic regression model, there was significant difference between effacement, dilatation of cervix, gravidity, method of induction (P=0.000) and birth weight (P=0.001) with success of induction. Conclusion: Cervical dilatation, effacement and birth weight have higher predictive value than age, gravidity and fetal decent. © 2016, Mashhad University of Medical Sciences. All rights reserved.