Hey Jen
I went to the doctors a week and a half ago, at 21 weeks, and I measured in at 25 cm's, and my doctor was a bit worried about me developing GD, so is sending me for a full GTT at 26 weeks, also another US scan (though they want to check bubbas heart in detail, so that is the US reason). I developed GD last pregnancy, so they are just keeping an eye on things and try to prevent it this time. I am not worried at all about bubba being big, or long, as all mine are long, and big (DH is 6ft 4, i am only just 5ft 5) so i kinda expect it, so no probs as long as you can stay comfortable, things should be fine