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Male DNA in women's brains could protect against Alzheimer's
Women with sons may be less likely to develop Alzheimer's disease because they have male DNA in their brains, a study suggests.
Researchers found that up to two thirds of women carry male DNA in their brain, which was most likely passed on to them while pregnant with sons.
The exact medical consequences of the transfer from foetus to mother remains unclear but a study showed it was less common in women who suffered from Alzheimer's, suggesting that it could offer protection against the condition.
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