??? Not sure why I just had mine done today I drunk the glucose waited an hr then they tookd 2 vial...If it was a 3 hour test then they stick u every hour. You only have this one performed if the 1 hour was high.....Call ur doctor...
I had to do mine twice cuz the hospital messed up the first one. With my first test they did three with the second they only did two. Not sure why though