Strength
As far as we have ascertained, this is the first RCT on postpartum PFMT on the morphological changes of the PFM after vaginal delivery in a study sample stratified on complete LA avulsion. In this study, ultrasound volumes have been analyzed by experienced examiners, and good to very good reliability has been shown. An added strength of the study was blinding of the outcome assessors, who also were blinded to delivery data. We used a PFMT program in which exercise science principles were followed [As we wanted to investigate whether early active rehabilitation after vaginal delivery in terms of PFMT could speed up tissue healing [