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Gestational Glucose Tolerance (2 hr Screening) Test

2 hour
Sample Report
Specimen Type: Blood


Gestational Glucose Tolerance (2 hr Screening) Test

The Gestational Diabetes Glucose Tolerance, 2 hour test may be used to screen for gestational diabetes by determining how effectively the body is using glucose. The Gestational Diabetes Glucose Tolerance test is recommended by the American Diabetes Association as standard screening for pregnant women at 24 to 28 weeks of gestation.  Glucose is the primary source of energy for the body's cells.  If the body is not producing proper amounts of insulin to move glucose to the cells, blood sugar can become too high which can cause health concerns for a woman and her infant. 

This test is typically ordered during pregnancy to aid in the diagnosis of gestational diabetes, especially for woman with higher risk for diabetes.

For additional testing options, please see out Prenatal Testing Category.

Turnaround time for this test is typically 1 business day.

Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.


People taking this test should be active and eat a regular diet that includes at least 150 grams of carbohydrates daily for three days prior to the test.  It is advised to discontinue, whenever possible, all nonessential medication that can affect glucose metabolism at least three days before testing.  Pleae consule your doctor regarding any medications you are taking.

The Gestational Glucose Tolerance test requires fasting 10-12 hours prior to blood collection.

The Gestational Glucose Tolerance Test is collected as 3 specimens, fasting, 1 hour after drinking a glucose solution at the lab and 2 hours after drinking the glucose solution. Please ensure to schedule at least 2 hours of time for your collection.



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