If patients with high blood glucose control their blood glucose within a reasonable range in time during preparation for pregnancy and gestation, the children they give birth to are usually normal, but if their blood glucose is too high, it may lead to preterm delivery, intrauterine growth restriction, hypoglycemia in newborns, and other abnormalities. When high blood glucose occurs during preparation for pregnancy and gestation, it is necessary to promptly control blood glucose within a reasonable range through dietary control, appropriate exercise, and the use of insulin and other glucose-lowering treatments to give birth to a child who is usually not affected. However, if blood glucose control is not standardized, resulting in persistently high blood glucose during pregnancy, it may lead to abnormalities such as miscarriage, preterm delivery, intrauterine growth restriction, macrosomia, fetal distress, malformations, etc., and the born child may also suffer from a variety of diseases, such as neonatal hypoglycemia, neonatal respiratory distress syndrome, etc., and it will also have an adverse effect on the pregnant woman. If you have abnormal blood glucose levels during pregnancy, you should actively cooperate with your doctor for treatment.