Regarding its role in endometriosis, studies have found that patients with endometriosis have lower levels of m6A in the endometrium than individuals with normal endometrium (Li et al., 2021) and that the expression levels of METTL3 and METTL14 are downregulated in ectopic endometria compared with eutopic endometria (Shen et al., 2023). The gene discussed is METTL14; the disease is endometriosis.