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While in the womb, the fetus gets nutrition freely from the mother's blood supply, so it is to the advantage of the fetus to take as much as possible and get fat, so that it will have reservves to draw upon when it is born and needs to start growing. Of course, it will still be fed after it is born, however, in evolutionary terms, it is safer to take what food you can when you can, than it is to count on future food supplies. The future can be uncertain. Mothers sometimes die in childbirth, so take advantage of them while you still can.

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15y ago

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