Gestational diabetes can be diagnosed when there is no diabetes before pregnancy and there is no problem with blood glucose in early pregnancy. 75g glucose tolerance test has one item higher than the diagnostic criteria: fasting blood glucose >= 5.1 mmol/L, 1 hour post-sugar blood glucose >= 10.0 mmol/L, 2 hours post-sugar blood glucose >= 8.5 mmol/L. If you are diagnosed with gestational diabetes, follow your doctor’s recommendations to control your blood glucose in the following ranges: fasting blood glucose <=5.3 mmol/L, 1 hour postprandial blood glucose <=7.8 mmol/L, and 2 hours postprandial blood glucose <=6.7 mmol/L.