Ovarian cancer is one of the most common malignant tumors of the female reproductive organs, with an incidence rate second only to cervical cancer and endometrial cancer. Epithelial carcinoma is the most common type of malignant ovarian tumor, followed by malignant germ cell tumors, among which ovarian epithelial carcinoma has the highest mortality rate among all gynecological tumors. In cases of ovarian cancer, an increase in AFP is common, particularly in malignant germ cell tumors. The most common of these is the yolk sac tumor, which has a specific value, as its AFP levels are often significantly elevated.