Many mothers-to-be are confused as to why they are diagnosed with diabetes when they think their OGTT results are in the normal range. The OGTT fasting: 5.1mmol/L, 1 hour 10.0mmol/L, 2 hours 8.5mmol/L. Especially for fasting blood sugar, the standard for non-pregnancy is 6.1, while the standard after 24 weeks of pregnancy is only 5.1.