Why do no creatures reproduce via the young continuing to grow inside until they 'explode' through the maternal skin?

Answer by  tamarawilhite (17883)

This is rare because it is fatal to the parent, thus is selected against in evolution. There are species which die after procreating, such as salmon.

Answer by  Kurt (4579)

If the offspring " explodes through the maternal skin" that would probably be the death of the mother. That would mean that females can only produce one offspring before dying. That would lead to the eventual extinction of the species. Evolution means survival of the fittest. Any changes that lead to less chance of survival probably do not flourish.

Answer by  annmarie817 (15)

Actually, there is a fish that I saw on the discovery channel that the male burrows into the female as it fertilizes, then the young pop out through her uterine walls. Not sure what it was called, but it was a deep sea fish.