DD2 was affected by IUGR but I to a lesser degree than what you are talking about. I had 4 weekly scans from 20 weeks (her small size was picked up at 20 weeks) and she was measuring below the 3rd percentile. Because DH and I are pretty small, for us below 3rd percentile wasn't as much of a worry as it sounds, we would expect some where around 15-25 percentile averaging our heights so it wasn't that far out of that range.

She was induced on her due date and was below the 3rd percentile, I would say around the size of a 34-35 week old, and born 1/2 kilogram lighter than her older sister. She is still below the 3rd percentile for everything except her weight which has just got to the line. Due to the IUGR she was born very very hungry. I think many IUGR babies are tube fed to start with so not getting enough it kind of dealt with, but as DD2 was borderline IUGR I was able to feed her myself, but it did cause us a few BFing issues i.e. she had no 'reserves' of energy to get her through until my milk came in so she was screaming with hunger at the stage when they are supposed to be going OK with just drops of colostrum. But it was nothing we couldn't work around.