I have GD also this time around didn't have it with my first. But I didn't have to redo the test. I just have to test my blood four times a day and limit my sugar intake. Chances of having a over weight baby is high. they said my placenta is blocking my insulin flow.
I had mine done today but I didn't do the one hour straight to the 3 hours. I asked y n the nurse said the doc just dies the 3 hour on everyone so there is no error. I passed the 3 test.. they draw blood every hour. I'm guessing since u failed ur 1st one now they have to retest to make sure if u fail this one then u have to get treatment to control ur sugar levels.