There are two types of tests used to diagnose gestational diabetes.
- Glucose Challenge Test (GCT) – a blood test is performed one hour after consuming a glucose drink. If the result is considered high, you will be requested to have an oral glucose tolerance test.
- Oral Glucose Tolerance Test (OGTT) – this test is performed after fasting overnight. A blood sample is collected before, and at one and two hours after consuming a glucose drink.
Some women will be tested earlier than 28 weeks if they have had gestational diabetes previously or are considered to be at a higher risk for developing gestational diabetes.
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