For instance, if your baby is supposed to gain 1/2 pound a week in the last month or so of pregnancy inside the womb, are they supposed to gain approximately that outside the womb? At 40 weeks gestational age, if they were born early, would they be about what they would have been when they were born, or more, or less? I'm sure it varies depending on the baby and the circumstances, but on average, what is the comparison?
Re: Do preemies grow faster inside or outside?
We'll miss you sweet Debbie Girl (4.21.12) and sweet Cindy Girl (8.9.12)

BFP(4) DD2 born 2.14.13 @ 35w5d due to pPROM
Babies generally grow faster on the inside than the outside, but preemies have fortified feeds so I don't know how it works out.
My girls were born 3.8 and 3.12 and about 5 at their due dates which is about normal for twins. They were not put on feeding tubes until they were about 1 week old got TPN until then which babies don't gain as fast on.One of mine also had surgery and was NPO for a week.