References
- RCOG. Induction of labour. In. Evidence-based clinical guideline number 9. London: RCOG Clinical Support Unit; 2001.
- Paterson-Brown S, Fisk NM, Edmonds DK, Rodeck CH. Preinduction cervical assessment by Bishop's score and transvaginal ultrasound. Eur J Obstet Gynecol Reprod Biol 1991; 40: 17–23
- Boozarjomehri F, Timor-Tritsch I, Chao CR, Fox HE. Transvaginal ultrasonographic evaluation of the cervix before labor: presence of cervical wedging is associated with shorter duration of induced labor. Am J Obstet Gynecol 1994; 171: 1081–7
- Watson WJ, Stevens D, Welter S, Day D. Factors predicting successful labor induction. Obstet Gynecol 1996; 88: 990–2
- Gonen R, Degani S, Ron A. Prediction of successful induction of labor: comparison of transvaginal ultrasonography and the Bishop score. Eur J Ultrasound 1998; 7: 183–7
- Ware V, Raynor D. Transvaginal ultrasonographic cervical measurement as a predictor of successful labor induction. Am J Obstet Gynecol 2000; 182: 1030–2
- Gabriel R, Darnaud T, Chalot F, Gonzalez N, Leymarie F, Quereux C. Transvaginal sonography of the uterine cervix prior to labor induction. Ultrasound Obstet Gynecol 2002; 19: 254–7
- Pandis GK, Papageorghiou AT, Ramanathan VG, Thompson MO, Nicolaides KH. Preinduction sonographic measurement of cervical length in the prediction of succesful induction of labor. Ultrasound Obstet Gynecol 2001; 18: 623–8
- Holcomb W, Jr, Smeltzer JS. Cervical effacement: variations in belief among clinicians. Obstet Gynecol 1991; 78: 43–7
- Phelps JY, Higby K, Smyth MH, et al. Accuracy and intraobserver variability of simulated cervical dilatation measurements. Am J Obstet Gynecol 1995; 173: 942
- Hughey MJ, Mcelin TW, Bird CC. An evaluation of preinduction scoring systems. Obstet Gynecol 1976; 48: 635–41
- Dhall K, Mittal SC, Kumar A. Evaluation of preinduction scoring systems. Aust NZ J Obstet Gynaecol 1987; 27: 309–11
- Friedman EA, Niswander KR, Bayonet-Rivera NP, Sachtleben MR. Relation of prelabour evaluation to inducibility and the course of labor. Obstet Gynecol 1966; 28: 495–501
- Jackson GM, Ludmir J, Bader TJ. The accuracy of digital examination and ultrasound in the evaluation of cervical length. Obstet Gynecol 1992; 79: 214–8
- Bishop EH. Pelvic scoring for elective induction. Obstet Gynecol 1964; 24: 266
- Rane SM, Pandis GK, Guirgis RR, Higgins B, Nicolaides KH. Pre-induction sonographic measurement of cervical length in prolonged pregnancy: the effect of parity in the prediction of induction-to-delivery interval. Ultrasound Obstet Gynecol 2003; 22: 40–4
- Chandra S, Crane JM, Hutchens D, Young DC. Transvaginal ultrasound and digital examination in predicting successful labor induction. Obstet Gynecol 2001; 98: 2–6