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Glucose Screen for Gestational Diabetes

Medically reviewed by Last updated on Apr 2, 2024.

What is a glucose screen for gestational diabetes?

A glucose screen for gestational diabetes is a blood test to find out if you have diabetes caused by pregnancy. The test measures the level of glucose (sugar) in your blood at different points in time.

Why do I need a glucose screen?

High blood glucose levels throughout your pregnancy can be harmful to you and to your unborn baby. You will need to manage your blood glucose if you do have gestational diabetes. Healthcare providers will help you create meal and physical activity plans to keep your blood glucose levels stable.

When is the glucose screen done?

The test may be done at or after 24 weeks of pregnancy. You may be tested during your first prenatal visit if you have an increased risk for diabetes. Your risk is increased if you have a family member with diabetes. You also have an increased risk if you are overweight or you have prediabetes. Your risk for gestational diabetes is also higher if you have given birth to a large baby before.

How is the 1-step glucose screen done?

How is the 2-step glucose screen done?

Care Agreement

You have the right to help plan your care. To help with this plan, you must learn about your lab tests. You can then discuss the results with your healthcare providers. Work with them to decide what care may be used to treat you. You always have the right to refuse treatment.The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.