When you think about it, the measurements are tiny. It's easy to imagine them as huge differences, but it's only cm's. When I was 36weeks, they decided to worry me to death (the midwives) by saying my bub had shrunk. So I went for an u/s. She hadn't shrunk but she had measurements all over the place. her tummy was ready to be born (40weeks plus) her head was 35 weeks and her legs were 37 weeks. i thought I was going to give birth to a turtle.
Sometimes we just find out too many things that aren't important. My baby looked TOTALLY normal and was perfect in my opinion. Alot of what we find out in pregnancy is stuff that without new technology we wouldn't know anyway, and I think we'd be alot better off without it!! xo