“…The literature search results are represented in Figure 1. Eight original articles were excluded because five studies investigated women who underwent surgical interventions to treat ovarian endometrioma (Benaglia et al, 2012;Donnez et al, 2001;Mao et al, 2009;Nakahara et al, 1998;Suzuki et al, 2005), one had a control group of ovarian cysts (Kumbak et al, 2008), one had a control group with endometriosis but without ovarian endometrioma (Isaacs et al, 1997), and in one study, no extractable data were available (Benaglia et al, 2011). Therefore, the total number of studies included in the meta-analysis was nine.…”