test results for glucose test
The oral glucose tolerance test is more complicated and is used less frequently for diagnosis than the fasting plasma glucose test. For this test, the person drinks a solution containing 75 grams of glucose. Two hours later, a blood glucose level of 200 mg/dl or higher indicates diabetes.
If you're being tested for gestational diabetes, your doctor will consider the results of each blood glucose test. At Mayo Clinic, if your blood glucose level is higher than 140 mg/dL (7.8 mmol/L) after the one-hour test, your doctor will recommend the three-hour test. If your blood glucose level is higher than 190 mg/dL (10.6 mmol/L) after the one-hour test, you'll be diagnosed with gestational diabetes.