What is the primary purpose of performing a glucose tolerance test before a pregnancy is further evaluated for gestational diabetes?

What is the primary purpose of performing a glucose tolerance test before a pregnancy is further evaluated for gestational diabetes?

• A. To assess hepatic function
• B. To assess pancreatic beta-cell response
• C. To screen for bacterial infection
• D. To measure lipid levels

Answer: (B)

The glucose tolerance test mainly checks how well the body handles a glucose load, which directly reflects pancreatic beta-cell insulin secretion and how effectively tissues respond to insulin. In pregnancy, insulin resistance increases, and the test reveals whether the beta cells can compensate by producing enough insulin to keep blood glucose normal. If glucose levels stay high after the glucose challenge, gestational diabetes may be present. So the test is about the body's ability to regulate glucose via insulin, not about liver function, infection, or lipid levels.

The glucose tolerance test mainly checks how well the body handles a glucose load, which directly reflects pancreatic beta-cell insulin secretion and how effectively tissues respond to insulin. In pregnancy, insulin resistance increases, and the test reveals whether the beta cells can compensate by producing enough insulin to keep blood glucose normal. If glucose levels stay high after the glucose challenge, gestational diabetes may be present. So the test is about the body's ability to regulate glucose via insulin, not about liver function, infection, or lipid levels.