The best time for ultrasound ablation (Helio knife) treatment is generally to be performed during the non-menstrual period. For patients with uterine fibroids, this is 1 to 2 weeks before menstruation, because at this time, the endometrium is most clearly visible and damage to the endometrium can be minimized during the treatment process. For patients with adenomyosis, the best time for treatment should be 3 to 14 days after menstruation. Why do you choose to treat adenomyosis after menstruation as opposed to fibroids? The main reason is that in adenomyosis patients, the pelvic cavity becomes congested during the period before menstruation, and if treated at this time, it will be more difficult to treat. Therefore, patients with adenomyosis choose to be treated after their periods are cleared. Patients, after knowing the best time for ultrasound ablation (Helio knife) treatment, they can better choose their treatment time and get good results.