Factors associated with labor after cesarean in a prospective cohort

The goals of this study were (a) to determine how experiences in the first perinatal period shape birth mode preference among individuals with a first birth by cesarean; and (b) to examine the relationship between birth mode preference and other factors and subsequent labor after cesarean (LAC).

Data are from the First Baby Study, a prospective cohort of 3006 primiparous individuals. The analytic sample includes individuals with a first cesarean birth and a second birth during the 5-year follow-up period (n = 394). We used multivariable logistic regression to examine the relationship between experiences in the first perinatal period and subsequent preference for vaginal birth, and between preference for vaginal birth and LAC in the second birth.

About a third of the sample preferred vaginal birth in a future birth, and 20% had LAC. Factors associated with higher odds of future vaginal birth preference were favorable prenatal attitude toward vaginal birth, lower perceived maternal-infant bonding at 1 month after the first birth, post-traumatic stress symptoms after the first birth, and desiring more than 1 additional child after the first birth. Odds of LAC were nearly 8 times higher among those who preferred vaginal birth (AOR = 7.69, P < .001). Fatigue after the first birth, post-traumatic stress symptoms after the first birth, and having higher predicted chances of vaginal birth after cesarean were also associated with higher odds of LAC.

Our findings suggest that the formation of preferences around vaginal birth may present a modifiable target for future counseling and shared decision-making interventions.