METTL14 and endometriosis: To independently validate this finding, we collected endometrial tissues from healthy individuals (n = 17), as well as eutopic (n = 29) and ectopic endometria from patients with endometriosis (n = 61), to evaluate the expression of m6A regulators, including METTL3, METTL14, ALKBH5, FTO, YTHDF1, and YTHDF2, via qRT‒PCR (Fig. 1C).