Glucose Challenge Test (GCT)- 75 Grams Of Glucose
- Category
- Pregnancy
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 2 days
- Fasting
- No Fasting
- Age
- 18+ Years
What Is This Test?
A glucose challenge test in which blood sugar is measured 2 hours after drinking a solution containing 75 grams of glucose.
Why this test is performed?
Used in pregnancy to screen for gestational diabetes (as per the single-step DIPSI approach widely used in India). A 2-hour value of 140 mg/dL or more is usually considered positive and needs follow-up with your gynaecologist.
Who should take this test?
Women planning pregnancy or who are pregnant, as advised by the gynaecologist.
Test Preparation
No fasting is needed. You will drink a 75 g glucose solution and a blood sample is taken 2 hours later. Stay seated and do not eat during the wait.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
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- Report time: In 5 days
- No fasting
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Frequently asked questions
Usually at the first antenatal visit and again at 24–28 weeks, or as advised by your gynaecologist.
No fasting is needed. You will drink a 75 g glucose solution and a blood sample is taken 2 hours later. Stay seated and do not eat during the wait.
Blood sample taken from a vein in your arm.
Usually within 11–35 hours after the sample reaches the lab. You will receive the report online.
This test is meant for women only.
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