Oh Julie, Im sorry that you have this happening. I dont have any experience with this myself but my sister's daughter was measuring small all through the pregnancy. Right up to the end. But when she was born, she was a healthy, normal 7lb plus baby! The doctors never gave my sister a reason. Im hoping this is the same situation for you and your little bean.
Thank you for the response Tricia and the positive message!
About our amnio results, it showed baby girl had an extra marker.
Ive only gained 5 lbs this pregnancy, but I was overweight to begin with so the doc isnt concerned.