Parasites Made The Evolution Of The Womb Possible

A new study in Nature shows that genetic parasites invaded the mammalian genome more than 100 million years ago and dramatically changed the way mammals reproduce.The molecular changes allowed mammals to carry their developing young within the womb rather than laying them in nests or carrying them around in pouches - the uterus was transformed. The findings published online Sept. 25 in the journal Nature Genetics describe in unprecedented detail the molecular changes that allowed mammals to carry their developing young within the safety of the womb rather than laying them in nests or carrying them around in pouches.read more

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