DS Jameson had intrauterine restriction of the long bones, which isn't seen often per our Peri and OB. At 28 weeks he was 2-3 weeks behind, but his head and torso measured on schedule. I was diagnosed with PE at 30 weeks, immediately admitted, but they didn't recheck growth until 31 weeks. By that point some of his long bones were 4 weeks behind.
I was handling the PE well, but the docs determined that Jameson would grow better on the outside after 34 weeks. They ended up taking him out at 33wk 1 day due to my rising BP.
We were told that if the IUGR was caused by the PE that he would catch up by 2 years old. When he arrived he was underweight for his gestational age but looked proportionate. He spent 5 weeks in the NICU due to breathing issues, but it doing wonderful and catching up with his growing.
My dopplars looked good too, but up to 28 weeks I was very very active, so who knows what the blood flow does under physical stress. Maybe the dopplars are "good enough" but not wonderful.
Its great that you are at 34 weeks and 18th percentile is not bad. I think I read that they start to worry if growth falls below 5th percentile.
Are you on bedrest?