Is There a Difference Between a Newborn and a Twin?

In a newborn baby, while it's growing in the uterus, there is less blood pulsing through. And if you've got a longer pipe, the blood flow will be slightly less. The twin that was bigger would have had the better blood supply. It's actually the one that isn't crawling or rolling or anything yet. Now we're into a whole different thing, which is how big are they and then following the growth curves along with their neurological development.