Blood was drawn 1 hour and 2 hours later to check blood glucose, during which you can drink water but not eat. The specific methods and precautions will be discussed later in the article. In the past, the diagnostic criteria for gestational diabetes were confusing, and many organizations had different criteria. Now the diagnostic criteria for gestational diabetes have been unified. If the pregnant woman fasting blood sugar ≥ 5.1mmol/L 1 hour blood sugar ≥ 10.0mmol/L 2 hour blood sugar ≥ 8.5mmol/L pregnant women can be diagnosed with gestational diabetes if the blood sugar exceeds the above criteria at any point after taking sugar. The hazards of gestational diabetes Gestational diabetes is harmful to both the fetus and the pregnant woman. First of all, gestational diabetes may have the following risks to pregnant women: premature delivery, excessive amniotic fluid, gestational hypertension, pre-eclampsia, diabetic ketoacidosis, which may turn into permanent diabetes after delivery, and secondly, gestational diabetes may also affect fetal stillbirth, fetal malformation, giant fetus, neonatal hypoglycemia, neonatal hyperinsulinemia, and the chances of children developing diabetes in the future will increase. Therefore, we should pay attention to it. The treatment of gestational diabetes is mainly diet control and moderate exercise, and most of the patients’ blood sugar will be controlled within the ideal range after individualized diet control and exercise. However, some pregnant women whose blood sugar still reaches the standard even after diet control and exercise should be treated with insulin injection. Glucose control target of gestational diabetes Fasting, pre-meal and bedtime blood glucose 3.3–5.3mmol/L