Researchers studied nearly 80,000 women ages 15 to 49 for the findings.
, published Wednesday in JAMA Network, found that women who use levonorgestrel-releasing IUDs face an increased risk of breast cancer, an unexpected finding given that IUDs were thought to be lower risk.
The study looked at just over 78,000 women in Denmark between the ages of 15 and 49 who used levonorgestrel-releasing IUDs and compared them to the same number of women who did not use the devices. Levonorgestrel, part of a class of medications called progestins, works by preventing the release of an egg from the ovary,New research shows benefits of getting 1-year supply of birth control pills at once
In the study, women who used IUDs had a 40% higher chance of developing breast cancer than those women who did not, around the same risk level shown infor women who take oral contraceptive pills. This translates to an estimated 14 more breast cancer cases per 10,000 women over five years.Among women ages 15 to 49 in the U.S.
While taking hormonal birth control -- whether orally or through an IUD -- may raise the risk of breast cancer, the risk is small and must be weighed against the benefits of hormonal birth control individually, on a case-by-case basis. Women should talk with their health care provider.the risk of ovarian and uterine cancers, for example, but it is also shown to increase the risk of clotting.
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