“…Fourteen studies included patients with endometriosis stage I to IV based on the ASRM classification [20,25,26,28,30,31,34,[38][39][40][41][42][43]49]. Women with moderate-to-severe endometriosis (stage III to IV) were included in ten studies [22,23,27,37,44,45,47,48,50,51]. Six studies did not mention the stage of endometriosis [29,32,33,35,36,46], and the remaining two studies included only women with stage I to II [24] and II to IV [21], respectively.…”