Question

Overt gestational diabetes is defined as blood glucose more than _?

• A. >200 mg/dl
• B. >126 mg/dl
• C. >100 mg/dl
• D. >180 mg/dl

Hint:

Think of the same fasting cut-off used to diagnose diabetes outside pregnancy.

Answer 1

The Correct Option is B

Step 1: Recall the diagnostic thresholds for hyperglycaemia in pregnancy. A fasting plasma glucose of 92 to 125 mg/dl is labelled as gestational diabetes mellitus (GDM).
Step 2: When the fasting plasma glucose reaches or exceeds 126 mg/dl, the degree of hyperglycaemia is in the diabetic range and the patient is classified as having overt (pre-existing or undiagnosed) diabetes rather than simple GDM.
Step 3: Therefore overt gestational diabetes is defined by fasting blood glucose >126 mg/dl, making option b correct.
Step 4: Values such as >100, >180 or >200 mg/dl do not match the accepted fasting cut-off for overt diabetes, so options a, c and d are wrong.