Women's Health Weekly
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Breast Cancer
Research results from Jagiellonian University, Medical Department update understanding of breast cancer
October 30th, 2008
According to a study from Krakow, Poland, "Higher exposure to light at night, for example, owing to night shift work or decrease in sleep duration, may suppress melatonin production, which in turn may increase the reproductive hormone levels. High levels of steroid hormones, especially estrogens, may be associated with an increase of the breast cancer risk." "This study investigated whether variation in the sleep duration during one entire menstrual cycle corresponds to estradiol saliva concentrations in healthy, urban women of reproductive age. During 2000-2001, 95 regularly menstruating women aged 24-36 in Poland collected daily saliva samples for one entire menstrual...
Source: Women's Health Weekly (2008-10-30)
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