Glucose Challenge Test (GCT)- 50 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
- 18-55 Years
What Is This Test?
A glucose challenge test in which blood sugar is measured 1 hour after drinking a solution containing 50 grams of glucose.
Why this test is performed?
A screening test for gestational diabetes, usually done at 24–28 weeks of pregnancy. A 1-hour value of 140 mg/dL or more usually needs a confirmatory glucose tolerance test (GTT).
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 50 g glucose solution and a blood sample is taken 1 hour 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.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
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Frequently asked questions
A high GCT is a screening result, not a diagnosis. Your doctor will usually advise a full glucose tolerance test to confirm.
No fasting is needed. You will drink a 50 g glucose solution and a blood sample is taken 1 hour 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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