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Fertility Drugs' Link to Breast Cancer Hinges on Pregnancy, Study Says
Do fertility drugs affect a woman's risk of developing breast cancer? A new study suggests that the risk hinges on whether they actually help a woman get pregnant. Researchers at the National Institutes of Health found that although the drugs seem to reduce breast cancer risk in young women, the risk goes up when they get pregnant. The study found that women who took the drugs and did not get pregnant had a slightly lower risk of developing breast cancer before age 50. Those who took the drugs and reported a pregnancy lasting 10 weeks or more had a slightly increased risk, but that risk was little different than the risk of women who never took fertility drugs at all.