The Risks of Gaining A Lot of Weight While Pregnant

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By Molly Clifton

Women who gain excessive amounts of weight during pregnancy may put themselves at risk for developing breast cancer later in life, according to scientists at Georgetown University.

Researchers already know pregnancy permanently turns on genes that protect against breast cancer.

But in the Georgetown study, scientists studied the effects of the obesity-hormone leptin on pregnant rats.

They found the hormone erased the positive effects of pregnancy and increased the risk of breast cancer after menopause.



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