Ovarian teratoma is a type of germ cell tumor, and women with ovarian teratoma are very concerned that it may affect their fertility. There is no definite answer as to whether ovarian teratoma affects fertility because it depends on a number of factors, such as the nature of the ovarian teratoma, the size of the tumor, the individual’s health and other factors. If the ovarian teratoma is less than three centimeters in size and is determined to be a mature teratoma, it will have little to no effect on a woman’s fertility. However, if the size of the tumor is more than 5 centimeters, it may compress the ovaries and affect ovulation, so even if the tumor is benign, it may have some effect on fertility. Malignant ovarian teratoma, regardless of its size, will definitely have an impact on a woman’s fertility because it can affect the production of follicles, the entry of sperm, the operation of fertilized eggs and many other aspects, thus causing permanent infertility. Therefore, there is no fixed answer to the question of whether ovarian teratoma affects a woman’s fertility, but it can only be analyzed and judged based on various aspects of ovarian teratoma. Women with ovarian teratoma do not have to worry too much because most of them are benign tumors and grow very slowly. Theoretically, it can affect a woman’s fertility, but in reality, most of them do not.