What are the side effects of the treatments?

Ventilators may damage the baby's lungs. They also may cause chronic breathing problems. High levels of oxygen are sometimes needed to make sure the baby's organs get enough. This can have the side effect of damaging the blood vessels in the eyes. This in turn can cause poor vision. Certain antibiotics can cause trouble with hearing as the baby grows. Very premature babies often need to be fed through the bloodstream instead of through their guts. These babies can develop liver injury as a result.