• Have a confirmed pathological diagnosis based upon hysteroscopy: histologically prove AEH or well-differentiated EEC G1 without myometrial invasion: 1. Untreated patients; 2. Patients with persistent lesions after one course (12 weeks) of progesterone therapy; 3. Patients who did not achieve complete remission after 2 courses (24 weeks) of progesterone therapy;

• No signs of suspicious extrauterine involvement on enhanced magnetic resonance imaging (MRI) or enhanced computed tomography (CT) or ultrasound

• Have a desire for remaining reproductive function or uterus

• Good compliance with adjunctive treatment and follow-up