So, ambrosia affects the age of a ghost, too? I have never fed a ghost ambrosia, so I would not know. The ghost chapter in the guide says: "...Follow the link to learn more about making this dish. It will bring a Sim from death (ghost) back to a normal state, and can perpetually halt death due to aging when eaten by living Sims. The Sim's age bar will revert to 0 days at that state in their life span." I thought that this means that ambrosia does not affect the age of a ghost.
And if my sim ate ambrosia right after he aged up to child, that would not affect his age at all.
Anyway, I take that my sim can eat ambrosia after he has finished his requirements and before trying for a baby?