GNRH1 and Dysmenorrhea: A total of 31 patients whose dysmenorrhea recurred received additional treatments: of whom 7 had partial or complete hysterectomy, 3 had the levonorgestrel-releasing intrauterine system, another 7 had GnRH agonists or painkillers and the rest 14 patients had retreatment with USgHIFU ablation (Figure 3).