Why do premature babies take so long to “catch up” in size to babies born at a normal time?

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A google search reveals that premature babies take around 3 years to catch up, but a premature baby is obviously not born more than a couple months earlier than they “should” be. Why does it take so long for them to develop, why wouldn’t they just continue growing as they would have inside the womb?

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Anonymous 0 Comments

If you go based on how long it’s been from time of conception, a premature baby is literally younger than a full term baby for the rest of their lives. In babies there is a huge difference between a 4 month old and a 6 month old, so they will naturally be way behind if they are 8 weeks premature. This sort of dissipates over time bc there isn’t much difference between a 5 year old and a 5 year 2 month old.

Also the womb is the perfect environment for a growing baby. Once outside the womb a newborn premature baby will not develop as quickly.

My friend had a baby at 11 weeks early and it then took 20 weeks till they could take him home (2 months past his original due date). So he was 5 months old, maybe 6-8 lbs, and he was not as healthy as a normal newborn, he was on oxygen and had other issues. So physically he was like 5 months behind other kids his age and it took a while to catch up and for the difference be less noticeable.

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