Re-use of this article is permitted in accordance with the Terms and Conditions set out at http://wileyonlinelibrary.com/onlineopen#OnlineOpen_Terms
Maternal obesity and labour complications following induction of labour in prolonged pregnancy
Article first published online: 26 JAN 2011
© 2011 The Authors Journal compilation © RCOG 2011 BJOG An International Journal of Obstetrics and Gynaecology
BJOG: An International Journal of Obstetrics & Gynaecology
Volume 118, Issue 5, pages 578–588, April 2011
How to Cite
Arrowsmith, S., Wray, S. and Quenby, S. (2011), Maternal obesity and labour complications following induction of labour in prolonged pregnancy. BJOG: An International Journal of Obstetrics & Gynaecology, 118: 578–588. doi: 10.1111/j.1471-0528.2010.02889.x
- Issue published online: 11 MAR 2011
- Article first published online: 26 JAN 2011
- Accepted 1 December 2010. Published Online 26 January 2011.
- Body mass index;
- induction of labour;
- labour complications;
- prolonged pregnancy
Please cite this paper as: Arrowsmith S, Wray S, Quenby S. Maternal obesity and labour complications following induction of labour in prolonged pregnancy. BJOG 2011;118:578–588.
Objective To investigate the effect of maternal obesity on mode of delivery following induction of labour (IOL) for prolonged pregnancy and subsequent intrapartum and neonatal complications.
Design Retrospective (historical) cohort study.
Setting Liverpool Women’s Hospital NHS Foundation Trust, UK.
Population A total of 29 224 women with singleton pregnancies between 2004 and 2008 of whom 3076 had a prolonged pregnancy (defined as ≥290 days or 41+3 weeks of gestation) and received IOL.
Methods Kruskal–Wallis test, chi-square test and multivariable logistic regression.
Main outcome measures Mode of delivery and risk of delivery and neonatal complications in obese verses non-obese women following IOL.
Results Obese women had a significantly higher rate of IOL ending in caesarean section compared with women of normal weight following IOL (38.7% versus 23.8% primiparous; 9.9% versus 7.9% multiparous women, respectively); however, length of labour, incidence of postpartum haemorrhage and third-degree tear, rate of low cord blood pH, low Apgar scores and shoulder dystocia were similar in all body mass index categories. Complications included a higher incidence of fetal macrosomia and second-degree, but not third-degree, tear in primiparous women.
Conclusions Higher maternal body mass index at booking is associated with an increased risk of prolonged pregnancy and increased rate of IOL. Despite this, more than 60% of obese primiparous and 90% of multiparous women with prolonged pregnancies who were induced achieved vaginal delivery and labour complications in the obese women with prolonged pregnancies were largely comparable to those of normal weight women with prolonged pregnancies. Our data suggest that IOL for prolonged pregnancy in obese women is a reasonable and safe management option.