Excess Estrogen in Pregnancy Can Silence BRCA1 in Daughters...

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http://www.sciencedaily.com/releases/2013/04/130409144839.htm

Excess Estrogen in Pregnancy Can Silence BRCA1 in Daughters, Increasing Breast Cancer Risk

Excess estrogen levels during pregnancy can disable, in their daughters, a powerful breast cancer tumor suppressor gene, say researchers at Georgetown Lombardi Comprehensive Cancer Center. They found the DNA repair gene BRCA1 to be silenced in one year-old girls exposed to a high hormonal fetal environment.