which week is best for gestational diabetes test?

Sarah

Hello,

I am currently 21 weeks and my doctors office has a walk in lab so my OB said i could go in anytime between 24-28 weeks for the GD test. I am of course super eager to know so inclined to go right at 24, but is it bad to go that early? will it be less accurate? wondering if any of you knew more about this.

Thanks!