Induction of labor after a prior cesarean delivery: lessons from a population-based study

Abstract

Objectives: The aims of this study were (1) to determine the success rate of induction of labor (IOL) in women with a prior cesarean section (CS) and (2) to compare the perinatal outcome of a trial of labor (TOL) in women with one prior CS who had an IOL, spontaneous onset of labor, or an elective repeated CS (ERCS).

Material and methods: This study population was divided into three groups: women who had (1) ERCS (n = 1916), (2) spontaneous TOL (n = 4263), and (3) IOL (n = 1576).

Results: (1) The rate of IOL in the study cohort was 20.3%; of these, 67.4% had a successful vaginal birth after cesarean (VBAC). (2) Patients in the spontaneous TOL group had a higher VBAC rate than did those who had IOL (P < 0.001). (3) The rate of uterine rupture was comparable among all study groups. And (4) a prior vaginal birth increased the likelihood of having a successful induction and a VBAC by 50%.

Conclusion: IOL in patients with a previous CS is successful in about two-thirds of the cases. Induction is a safe and useful tool that can serve as an alternative for ERCS and assist to reduce the rate of ERCS.