Furthermore, Méar et al. identified that the polymorphisms of IFNG (CA) repeat, GSTM1 null genotype, GSTP1 rs1695, WNT4 rs16826658, and WNT4 rs2235529 were significantly associated with endometriosis in a substantial cohort of patients with well-defined inclusion criteria by a systematic review and meta-analysis (Mear et al., 2020). This evidence concerns the gene WNT4 and endometriosis.