Isthmocele, also known as cesarean scar defect (CSD), is the disruption of the integrity of the myometrium in the cesarean section incision and the indentation of the opening in the myometrium towards the visceral peritoneum. Residual menstrual blood accumulating in the isthmocele sac can cause chronic endometritis, anormal uterine bleeding, infertility and chronic pelvic pain. There is currently no quality of life scale that assesses isthmocele symptoms. A scale is needed to determine the positive effect on the patient's quality of life after the surgeries are performed. This study it is aimed to develop a scale that evaluates the severity of isthmocele symptoms and the impact on quality of life due to isthmocele.