DNA findings shed light on our biological makeup

By Melissa Healy / The Bulletin
November 15, 2012

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 in the....

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