So went for a 4D elective us today. Baby girl is great but they were concern because she is measuring 4 weeks ahead! They told me my ob can request this info from them. I'm 30 weeks and baby measures 34. I don't have GD. I also haven't gained weight much this pregnancy ...5 lbs maybe...I did have extra weight pre pregnancy so ob was not worried about the lack of weight gain. For those whose babies measured ahead significantly, at what point do they change your due date or induce early? Just curious. At this rate, we are looking at a minimum 9.5 lb baby. Thanks.