The more a woman weighs, the more she is at risk of ovarian cancer, a new report suggests. A team at the American Institute for Cancer Research looked at 25 studies with data on 4 million women, 16,000 of whom developed ovarian cancer and came up with the conclusion that “greater body fatness is a probable cause of ovarian cancer in women.” However, the AICR report also suggests that woman don't have to be obese — with a BMI of 30 or greater — for the risk to start growing. Even overweight women have a higher risk, beginning at a BMI of about 28, which is considered overweight but does not qualify as obese. NBC News reports that 14,000 U.S. women every year from ovarian cancer.

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