Endometrial Neoplasm Malignant

The goal of this clinical trial is to explore the feasibility and outcome of fertility-sparing therapy in Stage IA G1-G2 Endometrial Cancer with less than 1/2 myometrial invasion. Researchers will render participants indication-extended fertility-sparing therapy. Researchers will compare the myometrial invasion group with the no myometrial invasion group to see if it is possible to propose an extension indication of fertility-sparing therapy for endometrial cancer.