Must pregnant women measure the glucose screening test and the glucose tolerance test? What are the differences between the two?

Patient's question:

No

Doctor's answer:

Glucose screening involves drinking 50 grams of glucose dissolved in water on an empty stomach, and then having blood drawn 1 hour later; Glucose tolerance test involves first having blood drawn on an empty stomach, then drinking 75 grams of glucose dissolved in water, followed by blood draws at 1 hour, 2 hours, and 3 hours later.