Further elucidating the role of NK cell-activating receptors, Saeki et al. [25] noted a decrease in co-expression of CD56+/NKp46+ and CD56dim/NKp46+ cells (p < 0.05) with a negatively correlated increase in IFN-γ-producing cells (p < 0.01) in subjects with endometriosis. This evidence concerns the gene NCR1 and endometriosis.