Fertility preservation methods can help protect ovarian function in patients undergoing treatments that may harm their fertility. Chemotherapy, pelvic radiotherapy, and ovarian surgery can affect hormone levels and reduce the ability to have children in the future. Patients' age, ovarian reserve, and type of treatment play a role in determining the risk of fertility issues. Options like freezing eggs or embryos and storing ovarian tissue can help preserve fertility. These methods have shown promising results in helping patients achieve pregnancy and have healthy babies. The choice of which method to use depends on factors like age, puberty, and personal circumstances.