GNRH1 and endometriosis: A meta-analysis of postoperative GnRH agonist treatment in endometriosis suggested that only long-term treatment (6 months) could prevent the recurrence of endometriosis, rather than 3 months duration treatment.[17] In our study, the duration of GnRH agonists was 3 months in most cases (14/15), only 1 case used Dipherelin for 6 months.