(NEW YORK) -– Mounting evidence suggests that hormone replacement therapy (HRT) in postmenopausal women may be linked to aggressive forms of breast cancer, according to results from an ongoing Women’s Health Initiative study.
The study shows that women who take a combination of estrogen and progestin therapy may even be at a higher risk of death from the disease.
Part of the ongoing study refers to women who have not had a hysterectomy and therefore are on a combination of estrogen and progestin (Prempro) and women with hysterectomies who were taking estrogen only in the form of Premarin.
Women taking estrogen only after their hysterectomy were not at an increased risk. This finding leads many physicians to suspect that it is primarily the daily use of the synthetic progestin in the Prempro combination that contributed to the breast cancer risk.
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