Big or small?

Just out of curiosity, did anyone’s baby measure small on ultrasounds and then come out bigger? I feel like I always see estimates of big babies and they come out much smaller. For example, my son is estimated at 4 lbs 5 oz and we deliver in 14 days or less and I am really hoping he comes out closer to 5 lbs by then so as to try and cut NICU time.

*I know ultrasounds can be off by a pound or more especially at the end. I am merely curious!*

*I know size doesn’t indicate how much time baby spends in the NICU*