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Fred Hutchinson Cancer Research Center
Some women actually have men on the brain
Some women actually have men on the brain

For decades after a woman has carried a male child in her womb or shared her mother's womb with a brother, she carries a faint but unmistakable echo of that intimate bond: male fetal DNA that lodges itself in the far recesses of her brain. That astonishing finding, published Wednesday in the journal Public Library of Science One (PLoS One), suggests that the act of having a child is no mere one-way transmission of genetic material and all that goes with it: There is an exchange of DNA that passes into the part of us that makes us who we are. That, in turn, may alter a woman's health prospects in ways her own DNA never intended. In the study, researchers from the Fred Hutchinson...

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