My thoughts and prayers are with them.
My DD was born at 23 weeks and was just over a pound.
She's a year old now and doing great! She's toddling around and getting into everything. You'd never guess she was a preemie, she's huge (bigger than most babies her age) and so far seems on track developmentally. She even has a new (full term) baby brother.
These tiny babies can be such little fighters.