During the endometriosis surgery, the surgeon will stage the patient according to the specific conditions of the patient during the surgery, such as the size of the lesion, the extent of the lesion, the degree of ovarian-fallopian tube adhesion and the closure of the rectal sink of the uterus: 1. Stage I: belongs to the mild lesion type, which can be treated expectantly; 2. Stage II: belongs to the mild lesion type, which can be treated by artificial insemination; 3. Stage III: belongs to the moderate lesion type, which requires the help of in vitro fertilization; 4. Stage IV: belongs to the severe lesion type, which requires the help of in vitro fertilization.