Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.Forum.
Your baby of 4 days had inhalation of fluid from birthing pool or may be inhalation of amniotic fluid
. baby is in I.C.U. for three days , now shifted to from I.C.U. it means that the baby is out of danger, and O2 levels must have increased.
will be there for few days more , due to residual fluids at the base of the lungs. With effecient treatment baby will be fine in few days.
If you feel necessary you can ask the doctor to consult a neonatalogist for acute care. As you said baby will be fine.
Wishing the baby a quick and complete recovery.