Methodological limitations in studying the association between the use of fertility drugs and cancer include the inherent increased risk
of cancer in women who never conceive, the low incidence of most of these cancers, and that the age of diagnosis of cancer typically is
many years after fertility drug use. Based on available data, there does not appear to be a meaningful increased risk of invasive ovarian
cancer, breast cancer, or endometrial cancer following the use of fertility drugs. Several studies have shown a small increased risk of
borderline ovarian tumors; however, there is insufficient consistent evidence that a particular fertility drug increases the risk of borderline
ovarian tumors, and any absolute risk is small. Given the available literature, patients should be counseled that infertile women may
be at an increased risk of invasive ovarian, endometrial, and breast cancer; however, use of fertility drugs does not appear to increase
this risk. (Fertil Steril 2016;106:1617–26. 2016 by American Society for Reproductive Medicine.) |