A statistically significant positive correlation was observed between the concentration of IGF-1 and IGF-2 in the peripheral blood of women with GDM and the IGF-1 concentration (rho = 0.352; p = 0.0069), and the concentration of IGF-2 (rho = 0.644; p < 0.0001) in the serum of umbilical cord blood of newborns delivered by women with GDM. The gene discussed is IGF1; the disease is gestational diabetes.