Sure, the girl is an inch longer than the boy. We don't worry about it, we figure that since they're identical, one is as good as the other. We used to paint thier names on the bottom of their feet. But since that kept wearing off, we weighed them and found out that the boy is a pound heavier than the girl. We call the Psychic HotLine and they can tell us.
Parents can always tell.
At least that's what we delude ourselves into believing. We're not sure yet. It's easy, they have different names. I don't know who is who, but I love them the same. I gave birth to them.