Glycosylated hemoglobin is used to detect the level of blood glucose control in pregnant women within 2 months, and the normal value is <6.0 mmol/L. A value greater than normal indicates that the pregnant woman's blood glucose is not well controlled by diet and exercise alone, and insulin treatment is required. First of all, fasting blood glucose and blood glucose 2 hours after three meals should be tested, and this will be used as the standard to decide the insulin dosage of the patient. Insulin can be divided into short-acting insulin and medium-acting insulin, and can be mixed before bedtime. The use of insulin should be adjusted and individualized according to the blood glucose test index and the insulin sensitivity of pregnant women.