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Abstract
Objectives: to assess the effectiveness of transvaginal ultrasound assessment of cervix prior to induction of labor in prediction of successful induction and to determine the pre induction ultrasonographic data at which the induction will be successful. Results: Successful induction of labor correlated significantly with gestational age (p 0.008), indication of induction (p value: 0.003), the Bishop score (p < 0.007) and ultrasonographic cervical length (p < 0.001) and cervical funneling (p < 0.001). As for assessment of the cervix by Bishop score, Bishop score of 3.5 showed a sensitivity for prediction of successful induction of labor of 69% and specificity of 65%. As for assessment of the cervix by transvaginal ultra sound, the sensitivity for prediction of successful induction of labor was 89% at cervical length of 4.2 cm and 55% for positive funneling and specificity up to 93% at cervical length of 3.5 cm and 100% for positive funneling. Conclusion: cervical length and funneling were more sensitive and specific than the Bishop score for the prediction of successful labor induction.