What is the effect of postmenopausal hormone use on a women's risk for breast cancer?

Updated: Dec 26, 2019
  • Author: Graham A Colditz, MD, DrPH; Chief Editor: Chandandeep Nagi, MD  more...
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Ever users of postmenopausal estrogens have little or no increase in risk of breast cancer compared with women who have never used this therapy. As for oral contraceptives, ever use is a poor measure of exposure because it fails to distinguish between short and long duration and recent and past users, nor does it distinguish type of hormone therapy used. Hence, it does not provide meaningful evidence on the overall safety of hormone therapy.

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