Older obese women are more at risk for ovarian cancer than women of normal weight. Printed in Cancer, new research studied 94,525 women, ages 50 to 71, for 7 years. During that period, 303 participants developed ovarian cancer. Scientist determined obese women, i.e. having a body mass index of 30 or more, were 1.26 times more likely to get cancer; The New York Times reports.