A concern patients would have is whether radiation would affect fertility and their ability to become parents in the future. In females, if the radiation is used to treat ovary cancers, and there is a high risk of causing sterility. Radiation used on other parts of the body is unlikely to affect the reproductive system. However, pregnant women must not undergo radiation therapy as it can harm the baby. In males, if radiation is directed on the testicles then the man can become sterile, else it is unlikely to cause any problems.