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The glucose tolerance test is done in several steps. When you arrive at your doctor's office or lab, a member of your health care team will take a sample of blood by pricking your fingertip or inserting a needle into a vein in your arm. This blood sample will be used to measure your fasting blood glucose level.
If you're being tested for type 2 diabetes:
The American Congress of Obstetricians and Gynecologists recommends performing a one-hour blood glucose test first to screen for gestational diabetes in low-risk patients. If your doctor determines you're at risk or you have a suspicious value on the one-hour test, you may take the longer blood glucose test. For this test:
After drinking the glucose solution, you'll likely need to remain in the doctor's office or lab while you're waiting for your blood glucose level to be tested. After the glucose tolerance test, you can return to your usual activities immediately.
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