The contraceptive pill, or "the pill," which uses the hormones estrogen and progestin to prevent pregnancy, is currently used by about 100 million women worldwide. A number of studies have suggested possible links between contraceptive pill use and breast cancer, strokes, heart attacks, and blood clots, raising concerns about the medication's safety. Now, data from a 36 year study show that cancer risk was up to 12% lower in women who took the pill. However, those who used the medication for longer than 8 years were actually at increased risk of developing cancer.
Source: The Free Dictionary & http://news.bbc.co.uk/2/hi/health/6987889.stm
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