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How does hormone replacement therapy increase the risk for breast cancer?

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Long-term use of combined estrogen and progesterone increases the risk of breast cancer. This risk seems to return to that of the general population after discontinuing them for five years or longer.

From: Risk Factors for Breast Cancer WebMD Medical Reference

SOURCES: The American Cancer Society. National Cancer Institute.

Medscape. 

Reviewed by Laura J. Martin on November 11, 2016

SOURCES: The American Cancer Society. National Cancer Institute.

Medscape. 

Reviewed by Laura J. Martin on November 11, 2016

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How does exposure to estrogen increase the risk for breast cancer?

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