It's been a while since high school biology class, and I can't ask my sister right now, but I don't think humans are born in eggs. What does an artificial egg hatching chickens have to do with cloning humans?
Technically speaking, we could engineer it in a way where humans are born from eggs. It would just have to be a very big egg and would also have to continue growing in an incubator after hatching much like chickens rather than the standard womb senario.