ORAL GLUCOSE CHALLENGE TEST (GCT)

Instruction for GCT

Go to a lab. You will be given a drink by the lab. 1 hour after drinking this, you will have a blood test to check what your sugar levels are.

While this is not a fasting test, do NOT have anything sweet to eat before the test.

• No fruit, juice, pop, sugary cereal, jams, jelly, honey, hot chocolate, sugar in your tea or coffee

• You may have green/herbal tea with no sugar, water, toast with butter, cereal with no sugar

• Try not to eat within 90 minutes of doing the test.

Your blood sugar will either be:

• Normal - your blood sugar is appropriately low. You do not have gestational diabetes.

• High - you have gestational diabetes. The office will refer you to an endocrinologist to manage this in pregnancy.

• In-between - you blood sugar is not low enough to confirm you do not have diabetes but also not high enough confirm you do have diabetes. In this case, you need to do a second test called Glucose Tolerance Test. This is a 2 hour test and requires fasting. The office will call you with more information if you are required to do this test. 

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