Induction of labor with oxytocin for initiating labor pains before
   spontaneous starting of pains is one of the ways of terminating pregnancy
   and it is used for various maternal or fetal indications. Bishop containing five
   cervical characteristics (dilatation-effacement-position – presenting part
   station – consistency) is scored from 0-10 and it is probably an effective
   factor on successful labor induction.  The aim of this study was to find
   relation of Bishop score with the rate of success in induction of labor.

          377 pregnant women with G.A>37 weeks who were candidates of labor
   induction for maternal or fetal indications were enrolled into the study. After
   determinating Bishop score by vaginal examination, induction of labor with
   oxytocin was performed in all patients.

          Successful labor induction rate  was 91.3% and failure rate was 8.7%.
   Vaginal delivery and cesarean section rate were 76.39% and 23.61%
   respectively and both successful induction and vaginal delivery were higher
   in multiparous in comparison to nulliparous women. There was a significant
   relation between Bishop score and successful labor induction or vaginal
   delivery (P=0.0001, P=0.0088). Cervical dilation was the only component in
   the Bishop which showed significant relation with successful labor induction
   and vaginal delivery. Duration of labor induction and time of reaching to
   active phase (dilation=4cm) was different in different groups of Bishop
   score.

          Generally success of induction was desirable in all groups of Bishop
   score, but considering the significant difference of groups in failure rate of
   induction, Bishop can be used as a valuable predicting factor. Bishop scores
   of more than four is associated with higher rate of successful labor induction
   and lower rate of cesarean.