Normal blood glucose ranges for pregnant women vary at different stages of pregnancy and should not exceed 5.1 mmol/L when fasting and 8.5 mmol/L 2 hours after a meal. Pregnant women are required to undergo a glucose tolerance test during mid-pregnancy to determine if their blood glucose levels are normal and the body’s glucose tolerance is normal, and if the blood glucose is elevated, it suggests the possibility of gestational diabetes. This disease will have a negative impact on the fetus, which can easily lead to excessive fetal weight, resulting in macrosomia, which will be prone to difficult labor and other conditions during delivery. When a pregnant woman’s fasting blood glucose exceeds 5.1mmol/L and her 2-hour postprandial blood glucose exceeds 8.5mmol/L, it is recommended that she go to the hospital in time, and take appropriate treatment under the guidance of the doctor, in order to promote the improvement of her condition and prevent adverse effects on the fetus.