The document summarizes research on the potential relationship between fertility drugs and ovarian cancer risk. It describes several studies, including a 2013 Cochrane review of 25 studies involving over 182,000 women. The Cochrane review found no evidence that fertility drugs increase the risk of invasive ovarian cancer compared to untreated subfertile women. It found a possible increased risk of borderline ovarian tumors in women treated with IVF. However, some studies showing increased risk had high risk of bias. Overall, more high-quality research is still needed to determine if a definitive cancer risk exists.