LILRB2 rs383369:AG genotype was almost five times more frequent in severe stages (III + IV) of endometriosis than in milder (I + II) stages (P = 0.043, Pcorr. = 0.215, OR = 7.02, 95% CI = 0.90–54.43, Table 6). Here, LILRB2 is linked to endometriosis.