Women Who Had Assisted Reproduction at Greater Risk of Ovarian, Breast Cancers, Study Says

Women Who Had Assisted Reproduction at Greater Risk of Ovarian, Breast Cancers, Study Says
Women in the United Kingdom who had assisted reproduction are at greater risk of developing ovarian cancer and in situ breast cancer than the general population, a study found. But researchers attribute this to patient characteristics or increased surveillance among these women, rather than the procedure itself. Their study, "Risks of ovarian, breast, and corpus uteri cancer in women treated with assisted reproductive technology in Great Britain, 1991-2010: data linkage study including 2.2 million person years of observation,” was published in the medical journal BMJ. Sex hormones have a well-recognized role in cancers of the breast and reproductive system. Therefore, the increased use of assisted reproductive techniques — which use hormones to stimulate the ovaries and involve multiple ovarian punctures — have raised concerns regarding cancer risk. Studies have yielded inconsistent results, and the association between assisted reproduction and the risk of cancers remains unclear. A team from University College London sought to study the risks of ovarian, breast, and endometrial cancer in women who had assisted reproduction. They studied 255,786 women who had assisted reproduction in Great Britain between 1991 and 2010. The records, provided by the Human Fertilisation and Embryology Authority (HFEA), included a median follow-up time of nearly nine years. Researchers compared cancer rates with national incidence rates for the general female populat
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