
I don't know. Babies are pretty parasitic, especially early. They attach and feed like any other separate yet internal creature. If a person can show up on the other end of a teleportation spell with all of their fleas and worms and lice and biological entities separate from themselves that cause harm and/or keep them alive like intestinal bacterial colonies, they can probably show up with their baby. So then there's the question of whether teleportation works like a decontamination and every "life" separate from the teleporter is subsequently removed.