The normal range for a pregnant woman’s 2-hour postprandial blood glucose is less than 8.5 mmol/L. Therefore, a pregnant woman’s 2-hour postprandial blood glucose of 9.0 mmol/L is not normal. Clinically, the normal fasting blood glucose value range during pregnancy is no more than 5.1mmol/L, the normal 1-hour postprandial blood glucose value is no more than 10mmol/L, and the 2-hour blood glucose value is no more than 8.5mmol/L. Therefore, when the 2-hour postprandial blood glucose of a pregnant woman reaches 9.0mmol/L, it belongs to an abnormal situation. Long-term high blood sugar in pregnant women will affect the pregnant woman herself, such as causing diabetic nephropathy, cardiovascular and cerebrovascular diseases, retinopathy and so on. It also affects the health of the fetus, such as causing abnormal amniotic fluid volume, causing fetal lung maturation disorders, and leading to low birth weight babies or giant babies. If a pregnant woman’s 2-hour postprandial blood glucose is 9.0 mmol/L, it is recommended to use insulin therapy under the guidance of a doctor if there is no improvement after dietary control, and good control usually does not affect the health of the fetus.