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Journal of Perinatal Medicine

Official Journal of the World Association of Perinatal Medicine

Editor-in-Chief: Dudenhausen, Joachim W.

Editorial Board Member: / Bancalari, Eduardo / Greenough, Anne / Genc, Mehmet R. / Chervenak, Frank A. / Chappelle, Joseph / Bergmann, Renate L. / Bernardes, J.F. / Bevilacqua, G. / Blickstein, Isaac / Cabero Roura, Luis / Carbonell-Estrany, Xavier / Carrera, Jose M. / D`Addario, Vincenzo / D'Alton, MD, Mary E. / Dimitrou, G. / Grunebaum, Amos / Hentschel, Roland / Köpcke, W. / Kawabata, Ichiro / Keirse, M.J.M.C. / Kurjak M.D., Asim / Levene, Malcolm / Lockwood, Charles J. / Marsal, Karel / Makatsariya, Alexander / Nishida, Hiroshi / Papp, Zoltán / Pejaver, Ranjan Kumar / Pooh, Ritsuko K. / Romero, Roberto / Saugstad, Ola D. / Schenker, Joseph G. / Sen, Cihat / Seri, Istvan / Vetter, Klaus / Winn, Hung N. / Young, Bruce K. / Zimmermann, Roland

6 Issues per year

IMPACT FACTOR 2013: 1.425

SCImago Journal Rank (SJR): 0.782
Source Normalized Impact per Paper (SNIP): 0.928



Body mass index, Bishop score, and sonographic measurement of the cervical length as predictors of successful labor induction in twin gestations

Kyo-Hoon Park1 / Joon-Seok Hong1 / Woong-Sun Kang1 / Dong-Myung Shin1 / Shi-Nae Kim1

1Departments of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnamsi, Korea

Corresponding author: Kyo-Hoon Park, MD, PhD Department of Obstetrics and Gynecology Seoul National University Bundang Hospital 300 Gumi-dong Bundang-gu Seongnam-si Gyeonggi-do 463-707 Korea Tel.: +82-31-787-7252 Fax: +82-31-787-4054

Citation Information: Journal of Perinatal Medicine. Volume 37, Issue 5, Pages 519–523, ISSN (Online) 1619-3997, ISSN (Print) 0300-5577, DOI: 10.1515/JPM.2009.099, June 2009

Publication History

Published Online:


Aims: To evaluate the predictive value of body mass index (BMI), Bishop score, and sonographic measurement of cervical length for predicting successful labor induction (defined as an ability to achieve the active phase of labor corresponding to a cervical dilatation of ≥4 cm within 12 h of initiating oxytocin) in near-term twin gestations.

Methods: This prospective, observational study enrolled 72 consecutive women with twin gestations at >36.0 weeks' gestation who were scheduled for induction of labor. Transvaginal ultrasound for measurement of the cervical length was performed and the Bishop score was determined by digital examination. The BMI was calculated based on the weight and height at the time of induction.

Results: Labor induction was successful in 63% (45/72) of women. The mean BMI was significantly lower in women who had successfully induced labor, but no significant differences existed with respect to the mean cervical length, median Bishop score, proportion of parous and nulliparous women, and the mean total birth weight of the twin pairs between the two patient groups. Multiple logistic regression demonstrated that only BMI provided a significant contribution in predicting successful labor induction.

Conclusions: BMI independently predicted the success of labor induction in twin gestations but the sonographic measurement of the cervical length and Bishop score had poor predictive values for successful induction.

Keywords: Bishop score; body mass index; cervical length; labor induction; twin gestations

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