Arrange your collection
Choose where to be tested and plan around the required sampling times. The care team will coordinate your collection schedule.
Choose collection locationDiabetes · Individual laboratory test
Glucose Challenge Test (GCT, 50 Grams)
This pregnancy screening test measures glucose one hour after a 50 g glucose drink. It is a different appointment from a fasting diagnostic glucose tolerance test.
Price for this test on its ownAED 150Test price AED 50
Clinical authorDr Nirupama SabhapathySpecialist Clinical Pathology
- Sample
- Plasma (NaF)
- Laboratory turnaround
- 24 hours
- Collection
- Dubai
- Laboratory
- Intel Lab
Understanding the test
What does Glucose Challenge Test (GCT, 50 Grams) measure?
Also called Gestational Screen (50g)
This one-hour test can identify pregnant patients who need a more detailed diagnostic assessment. Only the post-drink glucose sample belongs to this screening protocol.
When it may be requested
Pregnancy screening
A maternity clinician may use this one-hour sample as a first screening step.
Choosing a follow-up test
The screening result helps determine whether a diagnostic tolerance test is indicated.
Before your sample
Prepare for collection
SpecimenPlasma (NaF)
Your checklist
The 50 g pregnancy screen normally requires no fast. Follow the maternity team's appointment instructions and allow the full hour after the drink before the blood draw.
A clinician collects venous blood into the container used for glucose testing. When this is a timed sample, the collection time is recorded alongside the result.
Smart Report
Understanding your result
24 hoursLaboratory turnaround
Result guideGlucose Challenge Test (GCT, 50 Grams)
Reading your result
The maternity team compares the one-hour result with its screening criterion. An abnormal screen and a diagnosis of gestational diabetes are different findings.
What can affect it
- The 50 g challenge is a screen and does not itself diagnose gestational diabetes.
From sample to follow-up
Your testing journey
Laboratory testGlucose Challenge Test (GCT, 50 Grams)
- Specimen
- Plasma (NaF)
- Turnaround
- 24 hours
Open your laboratory report
Look for Glucose Challenge Test (GCT, 50 Grams) in your report. Use the sample type and collection time when comparing it with an earlier report.
Explore Smart Report
Discuss the next step
Send the one-hour result to your maternity clinician and ask whether a diagnostic tolerance test is indicated.
Clinical expertise
Your laboratory team
Patient questions
Before you book
Does a raised screening result mean gestational diabetes?
It means that further evaluation is needed. Your maternity clinician decides whether a diagnostic glucose tolerance test is appropriate.
Do I have a fasting baseline sample with this screen?
The standard 50 g screen measures the glucose level one hour after the drink. A fasting diagnostic series is a separate order.
What if I miss the one-hour draw?
Tell the maternity or collection team. The actual time matters, and the clinician can advise whether the screen needs rearranging.
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Your next step
Glucose Challenge Test (GCT, 50 Grams) at home.
Sources & further reading
Written by Dr Nirupama Sabhapathy, Specialist Clinical Pathology. Medically reviewed by Dr Joyce Jose, Specialist Clinical Pathology, on .
Catalogue information and AED price checked on 2 November 2026. Clinical suitability, preparation, collection arrangements and turnaround are confirmed for your selected test.