This weight reduction at birth could be due to the high blood glucose concentration in the intrauterine milieu during gestational diabetes, since it was reported to induce pancreatic hypertrophy due to the over-stimulation of pancreatic β cells, preventing the secretion of insulin and decreasing anabolism and, subsequently, neonatal microsomia [3,34,35,36], this results are according with [37]. The gene discussed is INS; the disease is gestational diabetes.