الفهرس 
Anatomy of the CervixOnly 14 pages are availabe for public view
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Abstract
The aim of this study was to compare the performance of the Bishop score and transvaginal ultrasonography to predict successful labor induction, and to estimate the most useful cut-off points for the two methods. Methods. The five components of the Bishop score were assessed by digital examination and cervical length was measured by transvaginal ultrasonography in 120 women with a single pregnancy, 36-42 weeks of gestation, and a live fetus in cephalic presentation before induction of labor. Type of study Prospective observation study Patient and Methods: this study was carried out at Ain Shams University Maternity Hospital during the period from February 2009 to January 2010, it included 120 pregnant women who attend the reception room for delivery. Inclusion criteria Singleton pregnancy; 36–42 weeks gestation; Live fetus with; Cephalic presentation; Absence of active labor, No contraindication to vaginal delivery. Exclusion criteria: Dead fetus; Known gross fetal anomalies by pelvic ultrasound; The presence of contraindication for vaginal delivery or induction of labor as previous cesarean section, previous myomectomy…etc Results: There was a statistically significant good positive correlation between modified Bishop Score and success of induction of labor (r=0.686, p<0.001), and a statistically significant good negative correlation between cervical length measured by TVS and success of induction of labor (r=-0.606, p<0.001). The absolute value of correlation coefficient for modified Bishop Score is higher than that of cervical length measured by TVS, suggesting better predictability of the former than the latter. This is further confirmed by regression analysis of the modified Bishop Score and cervical length measured by TVS as predictors of successful induction of labor, which showed a higher adjusted R2 value of the modified Bishop score (adjusted R2 = 0.517), indicating that it was a better predictor for successful induction of labor than cervical length measured by TVS (adjusted R2 = 0.310). Regression analysis of the components of the modified Bishop Score as predictors of successful induction of labor showed that cervical effacement is the best predictor among other components regardless the parity, by having the highest adjusted R2 when regression analysis was performed on all included women (adjusted R2 = 0.152) and when performed on primigravidae (adjusted R2 = 0.154) or multiparae (adjusted R2 = 0.151)