My DS was born at 33 weeks. He needed to be on a ventillator and spent 5 days in NICU and a total of 27 days in hospital.

If bub is quiet small they may not be able to hold their body temperature and need to be in a humidicrib.
The sucking reflex usually kicks in around that 35-36wks so may or may not be an issue.
but every day and every week makes a big difference so the furthest you can get is going to help bub have the best start to life