Why do women have to give birth, can they just house their babies (unborn and developing) in incubators, like the same

Question: Why do women have to give birth, can they just house their babies (unborn and developing) in incubators, like the same as a womans womb??? And they contain the right stuff for a baby to be developed; how come that the baby needs to be housed in a mother's womb?
- Keywords:
  birth,
  develop,
  incubators,
  womb,
  women
Asked by caseym to Ed on 15 Jun 2011.
- Ed Morrison answered on 15 Jun 2011:
  
  Women give birth, like all female mammals, because that’s how evolution has designed animals to reproduce. In the future it might be possible to grow babies in incubators, but they might miss out on some importnat things. For example, unborn babies can hear their mother’s voice and recognise it when they are born. And the things a mother eats can affect the baby when it’s born.

Question: Why do women have to give birth, can they just house their babies (unborn and developing) in incubators, like the same as a womans womb??? And they contain the right stuff for a baby to be developed; how come that the baby needs to be housed in a mother's womb?