How can an egg form a fully formed animal outside the womb but we can’t do the same with a premature human infant?

Question

How can an egg form a fully formed animal outside the womb but we can’t do the same with a premature human infant?

In: 5

Answer 1

At some point, we might have the technology to create an artificial womb for that purpose but that’s scifi levels of progress from where we are now.