I'd take the kid to a country where cloning is legal and have him/her cloned. Hopefully, the second time, the baby finishes completely forming and even though the original child would probably die quickly they could at least "live on" in the second child.
Edit: Option number two would be to keep it alive long enough for science to figure out a process to make the brain finish growing or for science to develop a robot brain/AI and have the child be the worlds first actual cyborg.
Edit: Option number two would be to keep it alive long enough for science to figure out a process to make the brain finish growing or for science to develop a robot brain/AI and have the child be the worlds first actual cyborg.