Induction of labour after a previous caesarean section: a retrospective study in a district general hospital

A retrospective study was undertaken in a district general hospital to identify factors associated with vaginal delivery, as opposed to caesarean section, in women undergoing induction of labour after a previous caesarean section. The study was undertaken over 9 years (April 1994 - May 2003) and included patients in their second or subsequent pregnancy who had previously had one lower segment caesarean delivery and in whom labour had been induced. Records were extracted from a database and anonymised. Vaginal delivery after induction of labour was attempted in 81 patients of whom 64 (79.0%) subsequently delivered vaginally. There were few complications and no cases of uterine rupture. Two factors had a statistical significant relationship with vaginal birth after induction of labour; occipito-anterior position (OR 10.18, 95% CI 1.42 - 112.7, Yates corrected chi2; p = 0.001) and more than one previous birth (OR 4.76, 95% CI 1.28 - 21.67, p = 0.017). Other associations were explored but were not statistically significant. This paper contributes to the literature on factors associated with vaginal delivery after induction of labour and previous caesarean section, which may inform the selection of cases, and consequent success rates for vaginal delivery.