Gestational diabetes is diagnosed in outpatient clinics when blood glucose exceeds 5.1- 10.0- 8.5 mmol/l after taking 75 grams of glucose from 24 to 28 weeks. So what are the effects of gestational diabetes on the fetus, which all sugar mothers should not underestimate. Effects on the baby: The incidence of premature birth increases in pregnant women with diabetes. Diabetic mothers have a high incidence of delivering a large baby. Pregnant women with diabetes are more likely to have stillbirths, mostly after 36 weeks of gestation. The fetus of a pregnant woman with diabetes is prone to hypoglycemia. The incidence of fetal malformations in pregnant women with diabetes is 14-25%, which is 2-3 times higher than that in non-diabetic women, mostly central nervous system and cardiovascular malformations, and most of them are associated with excessive amniotic fluid. In pregnant women with severe diabetes combined with microangiopathy, it is easy to cause intrauterine growth arrest and increase the number of low birth weight babies. The perinatal fetal mortality rate is 4-5 times higher in diabetic women than in the general population. Effects on the mother: Combined gestational hypertension is also 4-8 times more likely to occur in pregnant women than in the general population, and they are more likely to develop gestational eclampsia. Microscopic blood vessels are prone to lesions that can affect the eyes, kidneys and heart. There is also an increased chance of respiratory infections, genitourinary infections and infections from mycobacteria. Therefore, once gestational diabetes is identified, the diabetes clinic as soon as possible for diet and exercise guidance, and if necessary, add insulin to control blood sugar.