The impact of a previous cesarean delivery on in vitro fertilization outcomes: a registry-based cohort study

A previous cesarean delivery was associated with lower live birth rates and other fertility-related pregnancy outcomes after the first subsequent embryo transfer when compared with a previous vaginal delivery. Because residual confounding cannot be excluded in this retrospective, registry-based study, these findings should be interpreted as associations. The results of this study emphasize the importance of further research to investigate possible etiologies that underlie this association.