In the described OGTT for gestational diabetes, how much glucose is ingested after fasting?

• A. 50 g
• B. 100 g
• C. 150 g
• D. 200 g

Answer: (B)

The test described uses a 100 g glucose load given after an overnight fast. In this diagnostic 3–hour OGTT, blood glucose is measured at fasting, then at 1 hour, 2 hours, and 3 hours after ingesting the 100 g glucose solution. The 50 g load is used for initial screening (often without fasting), while 150 g or 200 g are not standard for this gestational diabetes testing. So the amount ingested after fasting is 100 g.