It's just the high ping

Bigger on the inside

WIth "standard" multiples (twins and triplets) they schedule you a due date that is pretty close to the standard due date, just a little early. For these "large" multiples they get the babies to a safe weight and then do the c-section early so you're having a total of x[babies] at 2-4lbs each getting pretty close to the weight of a large standard baby (obviously the larger number and heavier weight it will surpass, but it's not like they're having multiple 8lb babies.