What can happen if a baby loses oxygen from its brain at birth?

Cerebral Palsy has been associated with oxygen deprivation in infancy. In mild form it can cause physical developmental delays, more severely it can cause mental delays. A neurologist, not a counselor, would test for this. The cause(s) of autism is unknown, but autism is usually diagnosed by a developmental pediatrician (since it is usually found in childhood) or by a psychiatrist.