ABSTRACT Objective — to study and evaluate the effectiveness of an operative method for correcting the inconsistency of the rumen on the uterus after an operation by a cesarean section at the stage of pre-conceptional preparation. Materials and methods. The study was conducted on the base of St. Petersburg State Pediatric Medical University in the perinatal center in the gynecological department from January 2016 to December 2017. 15 surgical interventions concerning the inconsistency of the scar on the uterus after cesarean section were made: 5 of which had laparoscopic access due to concomitant gynecological pathology (2 with external genital endometriosis, 3 with cystic ovarian formation), 10 surgical interventions had vaginal access. The diagnosis was confirmed by anamnesis of the disease, clinical manifestations, ultrasound examination, magnetic resonance imaging and hysteroscopy. Results. After the operative treatment, the most of the patients had no symptoms of scar incompetence on the uterus according to ultrasound and MRI. In 14 (93%) out of 15 of the examined patients, the «niche» was not detected. In 1 (7%) of the cases there were signs of insolvency in control ultrasound. The thickness of myometrium in the area of the scar after cesarean section according to ultrasound and MRI data is more than 3 mm — from 5.9 to 8.6 mm (average 7.4 mm) in 14 (93%) out of 15 patients. In 4 (100%) out of 4 patients abnormal uterine bleeding ceased, in 6 (85%) out of 7 the pains in the abdomen stopped. Six patients from the sample had a pregnancy that occurred naturally and proceeded without pathology. In this case, all 6 patients before the operation were diagnosed with secondary infertility. Conclusion. The use of surgical methods for the correction of the scar incompetence on uterus after the cesarean section has shown high efficiency and availability, which makes it possible to apply this technique in practice as pre-gravity preparation and prevention of further obstetric and gynecological complications, such as rupture of the uterus, implantation of the fetal egg in the scar, abnormal placental attachment, abnormal uterine bleeding, and also as an elimination of the factor of infertility.