Women who use talcum powder every day on their genitals are 40 percent more likely to develop ovarian cancer, according to a new Harvard Medical School study. Scientists say powder particles may travel to the ovaries and cause inflammation that allows cancer cells to flourish. Previous studies have warned about the link between talc and ovarian cancer, but the new study found the risks to be even higher than previously thought. Doctors say women should stop using talc immediately and can switch to cornstarch powder as a safe alternative. Risks apply only to talc used on the genitals, not on other parts of the body. [Daily Mail]