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HRT and cancer

There is strong evidence that using hormone replacement therapy (HRT) raises a woman’s risk of breast, ovarian and uterine cancers. At the same time, it may lower the risk of colorectal cancer.

HRT and breast cancer

Combined HRT for menopause is a known cause of breast cancer, mainly in women who recently used or are still using the therapy. There is also some evidence suggesting that estrogen-only HRT may also increase the risk of breast cancer.

HRT and ovarian cancer

Studies suggest that both combined and estrogen-only HRT increase a woman’s risk of ovarian cancer – but the risk is low.

HRT and uterine cancer

Research shows that using estrogen-only HRT increases the risk of uterine cancer.

HRT and colorectal cancer

Some studies suggest that users of combined or estrogen-only HRT may have a lower risk of colorectal cancer, while others do not. HRT is not recommended to prevent colorectal cancer.

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