1. examination of primary infertility and secondary infertility; 2. differential diagnosis of ectopic pregnancy (ectopic pregnancy), various unexplained pelvic pain, and the nature of pelvic masses with unclear open indications; 3. examination of unexplained small amount of intra-abdominal bleeding or small amount of ascites; 4. diagnosis of internal genital malformations; 5. diagnosis, staging of endometriosis and assessment of efficacy by laparoscopic examination again after drug treatment; 6, Diagnosis of endocrine diseases, such as polycystic ovary syndrome, premature ovarian failure, etc.; 7. Examination of uterine perforation and surveillance during uterine operation, such as aspiration after uterine perforation, uterine operation for deformed and pathological uterus, hysteroscopic electrodesiccation; 8. Finding or removing intrauterine devices or other foreign bodies lost in the abdominal cavity.