Most studies found nosignificant difference in CPR13, , , , , , –20 between the longGnRH-agonist and GnRH-antagonist protocols except for two subgroupanalyses.18,20 For advanced endometriosis, Hosseini etal.18 reported a significantly higher pregnancy rate with the GnRH agonistwhen anti-Müllerian hormone (AMH) levels were between 1.1 and 2.7 ng/ml(p = 0.04). Here, GNRH1 is linked to endometriosis.