Objectives. To evaluate the effectiveness of intrauterine ultrasonic cavitational irrigation in restoring of endometrium after pregnancy regression. Material and methods. 1A group consisted of 38 patients received the intrauterine ultrasonic cavitation irrigation and 32 patients of 1B group did not receive intrauterine irrigation. 22 women with chronic endometritis had a history of regressing pregnancy. The control group was represented by 8 apparently healthy women. Results. Histology of the endometrium, appropriate early proliferation phase without stromal lymphoid infiltration was observed in 66.7% of women from group 1A, and only in 25.2% of women from group 1B. Chronic endometritis was revealed in 56.3% of patients of 1B group. The effectiveness of the method in patients with chronic endometritis was 54.5%. It was significantly lower compared with the group where the treatment was started immediately after the vacuum aspiration - 66.7% (p<0.05) and significantly higher compared with women without cavitational irrigation - 25.2% (p<0.05). Conclusion. Intrauterine ultrasonic cavitational irrigation after pregnancy regression is effective method of rehabilitation of endometrial receptive area.