Tekiner NB, et al. - Researchers planned a prospective cross-sectional study to ascertain if there is a difference in the size of the cesarean scar defect using saline infusion sonography (SIS) performed on the postoperative third month in patients who underwent single- or double-layered unlocked closure of their uterine incision during their first cesarean delivery. In this study, the size of the uterine scar defect detected on SIS 3 months following the first cesarean delivery seemed not to be affected by single- or double-layered closure of the uterus.