To help young male cancer patients preserve their ability to have children in the future, scientists are studying ways to save their sperm. Cancer and its treatments can harm fertility, but freezing sperm is a good method to keep it safe. Recent progress has been made in freezing testicular tissue and stem cells, offering hope for those without mature sperm. However, not many people are aware of these options, leading to low use of frozen sperm. Doctors need to work harder to find better ways to protect fertility in young male cancer patients.