Jiang et al. [36] analyzed the expressions of 20 m6A regulators in 34 normal, 127 eutopic, and 46 ectopic samples of endometrium tissue from different menstrual cycle phases which were merged from public microarray datasets of endometriosis, and found that most m6A methylation regulators in endometriosis were abnormal in the eutopic vs. normal endometrium, including decreased METTL3/METTL14/RBM15/FTO and increased ALKBH5. This evidence concerns the gene METTL14 and endometriosis.