What you can expect

The glucose challenge test is done in two steps. When you arrive at your health care provider's office or the lab, you'll drink a syrupy glucose solution that contains 1.8 ounces (50 grams) of sugar.

You'll need to remain in your health care provider's office or the lab while you wait for your blood sugar level to be tested. You can't eat or drink anything other than water at this point.

One hour later, a blood sample will be taken from a vein in your arm. This blood sample will be used to measure your blood sugar level.

After the glucose challenge test, you can return to your usual activities immediately. Your health care provider will give you the test results at a later time.