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Research ArticleOriginal Article
Open Access

Predictors of cesarean section following elective post-dates induction of labor in nullipara with uncomplicated singleton vertex pregnancies

Fawaz E. Edris, Peter von Dadelszen, Laurie M. Ainsworth and Robert M. Liston
Saudi Medical Journal August 2006, 27 (8) 1167-1172;
Fawaz E. Edris
University of Western Ontario, 202-665 Windermere Rd, London, Ontario, Canada. Tel. +1 (519) 9133033. Fax. +1 (519) 6633162. E-mail: [email protected]
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Peter von Dadelszen
Department of Obstetrics and Gynecology, Children's and Women's Health Centre of British Columbia, University of British Columbia, Vancouver, Canada.
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Laurie M. Ainsworth
Research Institute for Children's and Women's Health, University of British Columbia, Vancouver, Canada.
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Robert M. Liston
Department of Obstetrics and Gynecology, Children's and Women's Health Centre of British Columbia, University of British Columbia, Vancouver, Canada.
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Abstract

OBJECTIVE: Although post-dates is among the most common indications for induction of labor, no studies have identified the predictors of cesarean section (C/S) in that population. The high cesarean rate in our institution for this group of women triggered us to assess different induction practices to elicit potential causes.

METHODS: We conducted a hospital-based retrospective cohort analysis using chart reviews of all nullipara women with induced labor at the Children's and Women's Health Centre of British Columbia, Vancouver, Canada, during the 2-year period, April 1998 to March 2000. The C/S rate was compared among 3 groups of women who were divided according to their induction method.

RESULTS: Three hundred and thirty-nine women meeting the inclusion criteria were induced. Of the 25 women who received oxytocin ideally and the 111 women who did not, 7 (28%) and 53 (48%) were delivered by C/S, (x2=3.228 p=0.07; relative risks 0.59 [95% confidence interval 0.30, 1.13]). A significantly lower C/S rate (x2=21.9, p<0.0005) was found among women induced with prostaglandin (PG) alone (19.4%) compared with those induced with PG and oxytocin, whether oxytocin was given ideally (38.3%) or not ideally (45.4%). Of women who received oxytocin, there was no difference in chorioamnionitis (x2=0.485, p=0.49) between those who had an early membrane rupture (with or pre-oxytocin, 22.4%) and those who had membrane rupture following a period of oxytocin infusion (18.5%).

CONCLUSION: The need for oxytocin or less than 2 doses of PG is associated with increased risk of C/S. Whether oxytocin was given according to protocol (ideally) or not, made no difference to the C/S risk in this population.

  • Copyright: © Saudi Medical Journal

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Saudi Medical Journal: 27 (8)
Saudi Medical Journal
Vol. 27, Issue 8
1 Aug 2006
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Predictors of cesarean section following elective post-dates induction of labor in nullipara with uncomplicated singleton vertex pregnancies
Fawaz E. Edris, Peter von Dadelszen, Laurie M. Ainsworth, Robert M. Liston
Saudi Medical Journal Aug 2006, 27 (8) 1167-1172;

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Predictors of cesarean section following elective post-dates induction of labor in nullipara with uncomplicated singleton vertex pregnancies
Fawaz E. Edris, Peter von Dadelszen, Laurie M. Ainsworth, Robert M. Liston
Saudi Medical Journal Aug 2006, 27 (8) 1167-1172;
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© 2023 Saudi Medical Journal Saudi Medical Journal is copyright under the Berne Convention and the International Copyright Convention.  Saudi Medical Journal is an Open Access journal and articles published are distributed under the terms of the Creative Commons Attribution-NonCommercial License (CC BY-NC). Readers may copy, distribute, and display the work for non-commercial purposes with the proper citation of the original work. Electronic ISSN 1658-3175. Print ISSN 0379-5284.

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