Pregnancy and parenthood can reshape mothers’ brains. Those changes might be a good thing, some research suggests.





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You may have read the news this week that pregnancy shrinks a mother’s brain. As a mom-to-be’s midsection balloons, areas of her cerebral cortex wither, scientists reported online December 19 in Nature Neuroscience,
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.
Yes, that sounds bad. But don’t fret. As I learned in reporting that story, a smaller brain can be more efficient and specialized. In fact,
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, post-pregnancy brains could be considered evolutionary works of art,
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, perfectly sculpted to better respond to their babies. The researchers found that the brain regions most changed during pregnancy are the ones that fire up when mothers see pictures of their babies. Pregnancy (and possibly childbirth) may make these neural networks sleeker and stronger,
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, helping moms to tune in to their infants.
As someone whose brain has shriveled at least one time, maybe twice (scientists don’t know if the brain keeps getting smaller with subsequent pregnancies),
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, I find it fascinating to think about this remodeling. The lingering question, however,
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, is whether those brain changes relate to a mother’s smarts. The world abounds with anecdotal attacks of baby brain and placenta dementia (a name that both entertains and offends me),
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, but are the conditions real? Do pregnant women and new moms really turn into forgetful,
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, bumbling idiots?

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