Jake was IUGR stopped growing as some point between 24 weeks and 34 weeks but thankfully started again. At 24 weeks he was in the 50th percantile on all graphs and by 34 weeks he was under the 3rd
We were extrememly lucky that for whatever reason the little monkey started growing again and by 38 weeks was about the 15 percantile and was no longer IUGR.
That said, i was induced anyways as I had developed PE.
My specialist said that this was the likely cause of Jakes growth problem. Those who have had PE in a previous pregnancy have a 15% chance of getting it again.
Given your baby was born pre term though I would think you will be referred to high risk team and they will decide if you need to stay under them.
I know for me I will only be referred if I start showing signs of PE or bubbas growth is not satisfactory.
You may find they just want you to have a few extra scans to watch how things are going.
As Jazzy said, I wouldnt worry to much now and find yourself a good midwife and she will organise referral to high risk.... There is a high risk thread in the pregnancy section if you want to have a nosey.. a few pre termers in there
Good luck!