The median range of leptin concentration in cord blood was ND group: Male [13.91 (3.22 – 47.63)], Female [16.88 (2 – 43.65)]; GDM group: Male [32 (7 – 76.00)], Female [36.73 (4.80 – 81.20)]; DM group: Male [20.90 (2 –76.00)], Female [32 {2.58 – 80.67)]. This evidence concerns the gene LEP and diabetes mellitus.