This test is also done at 24 to
28 weeks' gestation in women who have not been diagnosed with diabetes.
Step 1. A
50-gram glucose tolerance test with a blood sugar level check at 1 hour. If the blood
sugar at 1 hour is 130 to 140 mg/dL or higher, then go to step 2.
2. A100-gram glucose tolerance test is done while you are fasting. Gestational
diabetes is diagnosed when you have at least 2 of the following blood sugar
Fasting: 105 mg/dL or
1 hour: 190 mg/dL or
2 hour: 165 mg/dL or
3 hour: 145 mg/dL or
Talk with your healthcare
provider about being screened for gestational diabetes. Women who have been diagnosed
with gestational diabetes should be tested for diabetes at least every 3 years.