Women who take hormone replacement therapy are more likely to be diagnosed with ovarian cancer and to die of the disease, according to a study published in the Lancet (doi.10.1016/S0140-6736(07)60534-0) today.
Results from the Million Women Study, which is the biggest study of its kind in the world, show that over five years there is one extra case of ovarian cancer in every 2,500 women who take HRT. And for every 3,300 women who take HRT, there will be one additional death from ovarian cancer.
The researchers, who are largely funded by Cancer Research UK, estimate that use of HRT since 1991 has resulted in an extra 1,300 cases and 1,000 deaths from ovarian cancer.
The study also suggests that a woman's risk of ovarian cancer returns to a normal level within a few years of stopping HRT.
Read the press release for more information.
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