The normal range of blood glucose for pregnant women varies from fasting blood glucose, 1 hour postprandial blood glucose, and 2 hours postprandial blood glucose. The normal value of blood glucose for pregnant women is different at different moments. When pregnant women are fasting, the normal value of blood glucose is ≤5.1 mmol/L; 1 hour after meal, the normal value of blood glucose for pregnant women is ≤10.0 mmol/L; 2 hours after meal, the normal value of blood glucose for pregnant women is ≤8.5 mmol/L; 3 hours after meal, the normal value of blood glucose for pregnant women is ≤8.1 mmol/L. The diagnosis of gestational diabetes is confirmed when two or more of the above four indicators are exceeded. Gestational diabetes mellitus patients have significantly higher blood glucose levels, which will have an impact on maternal and neonatal outcomes. Early checking and control of blood glucose levels in pregnant women can effectively improve maternal and neonatal outcomes. If a pregnant woman has an abnormal blood glucose test result, it is recommended that she seek prompt medical attention to identify the cause of the problem with the help of her doctor, and then undergo targeted management or treatment.