I just did a little bit of searching on congenital hyperinsulinism, and there does seem to be a doctor specializing in the condition at Texas Children's hospital.
I also read a blog by a woman whose son has the condition and it seems very care intensive. On this blog she was saying that her child needs feeding carbs every 3 hours or so or his blood sugar will drop too low. The blog also mentioned the child having seizures prior to diagnosis.
I also checked the Wikipedia page for Baby Grace. They seem to have gone a very long way to dump her body? But I couldn't find an exact location where she was dumped, and I'm not sure which side of the island her body washed up?
I've closed the G maps page down now, but I'm thinking from League City area maybe up to Pasadena, there are a few places where the land juts out. And on the other side there's a small town called Winnie that has a road that leads right down to the sea...on the other hand I'd personally be tempted to dump a body before I got to the sea, but I suppose you never know. I'm also thinking a larger town is more likely due to someone being able to blend in more and people not noticing so much if a child is 'missing' from a home?
With the possible FAS I'm wondering about prostitution in the oil refinery areas? I'm not trying to be judgmental as I think a lot of prostitutes value their children highly and the prostitution helps them afford things for their children they otherwise couldn't afford, I'm just sort of trying to build up a 'profile' in my mind of things that might connect together. The thing is that prostitution can also go along with a mother not taking care of herself, even in pregnancy, and also having a 'father' that is abusive both to mother and child, and abuse and neglect in the household.
I'm sure my speculation is useless. I just hope so much that we're close to getting an ID for Little Jacob and finding out how he ended up where he did.