The typical person who does this sort of crime on an infant usually gets psychiatric treatment, a slap on the wrist, and probation.
If the infant dies, then, maybe, two to four, elible for probation in eighteen months.
At least the way things are now.
The American judicial system, in its infinite cowardice, devalues the victimhood of infants and children to the extent that you would get in more trouble for injuring a pet.