Inclusion Criteria:  The inclusion criteria are non-pregnant patients who had one or more cesarean sections, patients who had intermenstrual spotting after the cesarean section or those in which the TRM was less than 3.0 mm at the preoperative stage, and patients who underwent MRI and TVS to evaluate the size of the defect and the TRM before surgery  Exclusion Criteria:  Patients who had a history of chronic diseases (such as cerebro-cardiovascular diseases, malignancies and diabetes mellitus), endocrine disorders, menstrual irregularities before cesarean section, coagulation disorders, use of intrauterine devices, sub-mucous myoma, endometrial diseases, endometrial cysts, uterine fibroids, and adenomyosis after cesarean section