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

The egg basically *is* the womb, essentially it’s own little life support pod. For mammals our life support pod stays inside us and relies on the mothers biological processes to keep it supplied with nutrients.