Some decidualization-related genes are downregulated in both the endometriotic lesions and endometrium of women with endometriosis—HOXA10, forkhead box O1 (FOXO1), Indian hedgehog signaling molecule (IHH), and CCAAT/enhancer-binding protein-beta (C/EBPbeta) [57,58]. Here, FOXO1 is linked to endometriosis.