If human newborns came out as fully developed as chimp babies, human pregnancy would have to last at least twice as long. In a new theory, researchers argue that how much energy mothers can spare is the key factor in how long pregnancy lasts.
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Read the complete post at http://www.npr.org/blogs/health/2012/08/28/160174038/why-does-pregnancy-last-9-months?ft=1&f=103537970
Posted
Aug 28 2012, 01:49 PM
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Shots - Health Blog