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Scientists find sex hormones and breast cancer link in women under 50

and an increased risk of breast cancer in premenopausal women, according to a study published in The Lancet Oncology... on hormone levels in the blood of around 760 premenopausal women with breast cancer, and around 1700 without – from seven earlier s... premenopausal women, risk of breast cancer, oestradiol, oestrone, androstenedione,...