Pre‐induction sonographic measurement of cervical length in prolonged pregnancy: the effect of parity in the prediction of induction‐to‐delivery interval

Abstract

Objective To examine the effect of parity on the relationship between pre-induction cervical length and the induction-to-delivery interval and rate of vaginal delivery

Clinical and Ultrasound Parameters to Predict the Risk of Cesarean Delivery After Induction of Labor

“…Some authors have found results similar to ours 11,14,15,18,19,22,23,26,27 and concluded that transvaginal ultrasonography is a better predictor of outcome than Bishop score. Some of these also demonstrated that parity and BMI are important predictors.…”

“…Some of these also demonstrated that parity and BMI are important predictors. 11,14,23,26 However, many studies have also yielded conflicting results. 13,17,20,21,24,25,49 The variation in results is likely due to the different populations (gestational age, reasons for induction of labor, parity) and end points used in each study and the fact that some of the studies were multicentered and therefore using a combination of different management protocols for induction of labor within the same study.…”

“…[17][18][19] Overall there has been wide variation in the prediction of success of induction of labor with both the Bishop score and transvaginal ultrasonography. 11,[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] As well as assessment of the cervix, many other individual factors have also been shown to help predict the mode of delivery in spontaneous and induced labor. These include maternal age, 28 -30 parity, 11,31 body mass index, 26,32,33 maternal height, 34,35 gestational age at delivery, 36 fetal head position, 37,38 amniotic fluid volume, 39,40 and ultrasonic estimated fetal weight.…”

Use of ultrasound in the labor and delivery

“…CL's between 21 and 30 mm are not very predictive. The overwhelming majority of multiparas will deliver vaginally within 24 h; however, if the CL is greater than 30 mm, vaginal delivery within 24 h is expected to occur in only 40% of the cases [32]. Lastly, fetal occiput anterior or occiput transverse position at the onset of the induction will increase the chances for vaginal delivery, as compared to occiput posterior positions [33].…”

Évaluation de la balance bénéfice/risque selon l’âge gestationnel pour induire la naissance en cas de grossesse prolongée

“…Main results from the meta-analysis of Gülmezoglu et al [35] comparing a policy of induction of labor to a policy of expectative in cases of unfavorable cervix (number of studies : six [13,16,20,22,26,31] • un accouchement dans les 24 heures qui suivent un déclenchement en cas de grossesse prolongée (avec une prédictivité équivalente pour le score de Bishop et la longueur cervicale pour ce dernier item) [59] (NP3). …”