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1. The patient is advised to come to the laboratory in a fasting state, where after taking a fasting blood sample, the patient is given 75 grams of glucose.
2. Collect fasting blood and then collect blood samples at 30, 60, 90, 120 or 180 minutes.
3. Multiple samples are taken at half-hour intervals along with the urine sample. Some times the sample is taken at 1, 2, 3, and up to 4 hours.
This is a screening test for Gestational Diabetes mellitus. In case of abnormal results, Obstetrical GTT is recommended.
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