You don't need to fast prior to the test
. It's to see how your body metabolizes glucose
. If your results
fall within 'normal' you should be good to go. If not you'll have to do another glucose tolerance test. For this one you do have to fast (12 hours) and it's usually a 2 hour test. You'll have your fasting blood drawn, drink an even sweeter drink and then you'll get your blood drawn again 2 hours later. Again, you have to remain on premises. It's all to test for gestational diabetes.