The glucose tolerance test (OGTT) is primarily used to diagnose gestational diabetes and is performed in different time windows.

• A. Screen for Type 2 Diabetes
• B. Monitor For Lipids
• C. Diagnose Gestational Diabetes; Ordered in Different Time Windows
• D. Assess Liver Enzymes

Answer: (C)

The test measures how quickly your body clears a glucose load, which is exactly what becomes a problem in pregnancy when insulin resistance rises. In pregnancy, the oral glucose tolerance test is used to diagnose gestational diabetes, and this diagnosis depends on results measured at several time points after drinking the glucose solution (fasting, and then at 1 hour, 2 hours, sometimes 3 hours). Those multiple time windows are essential because each time-point value contributes to the diagnostic thresholds for gestational diabetes. The test isn’t used to monitor lipids or liver enzymes, and while it can indicate glucose intolerance, its primary role in this context is detecting gestational diabetes, with results interpreted across the different time points.