Then, we analyzed if DNMT1, 3A, 3B1, and DNMT3B3, 3B4, 3B5, 3B6, 3B7, and 3B3Δ5 isoforms’ expression was associated with the stage of disease and tumor grade in serous ovarian carcinoma (SOC). This evidence concerns the gene DNMT1 and neoplasm.