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It has been recommended that a 2-h 75-g OGTT be performed on all women at 24 to 28 weeks’ gestation not previously found to have overt diabetes or gestational diabetes mellitus (GDM) during early testing in their current pregnancy.
Two hours after you drink the glucose solution, an expected blood sugar level is 155 mg/dL (8.6 mmol/L) or lower. Three hours after you drink the glucose solution, an expected blood sugar level is 140 mg/dL (7.8 mmol/L) or lower.
A glucose level that is higher than normal may mean you have pre-diabetes or diabetes: A 2-hour value of 140 to 199 mg/dL (7.8 and 11.1 mmol/L) is called impaired glucose tolerance. Your provider may call this pre-diabetes. It means you are at increased risk of developing diabetes over time.
In general, providers use the following ranges for the two-hour glucose tolerance test: Normal: Under 140 mg/dL. Prediabetes: 140 to 199 mg/dL. Diabetes: At or over 200 mg/dL. For gestational diabetes and other conditions, the ranges and timing intervals may be different.
For the two-hour oral glucose tolerance test in adults: An 8-ounce solution with 75 grams of sugar; For the two-hour oral glucose tolerance test in children: The dose of sugar is calculated based on a child's weight: 1.75 grams of sugar per kilogram of weight (1.75 g/kg), with a maximum dose of 75 grams
Impaired glucose tolerance is defined as two-hour glucose levels of 140 to 199 mg per dL (7.8 to 11.0 mmol) on the 75-g oral glucose tolerance test, and impaired fasting glucose is defined as...
A 2-hour value of 140 to 199 mg/dL (7.8 and 11.1 mmol/L) is called impaired glucose tolerance. Your provider may call this pre-diabetes. It means you are at increased risk of developing diabetes over time. Any glucose level of 200 mg/dL (11.1 mmol/L) or higher is used to diagnose diabetes.