I. Prolonged menstruation, menstrual disorders, gonorrhea, drug treatment is ineffective; II. Ultrasound shows endometrial polyps or submucosal fibroids, uterine longitudinal septum; III. Intrauterine residues from incomplete abortion; IV. Habitual abortion needs to exclude uterine adhesions or uterine malformation; V. Ring ectopic. Ring inlay; VI. abnormal bleeding after menopause needs to exclude endometrial cancer; VII. multiple abortions resulting in low menstrual flow; VIII. time, 3 days after menstruation without intercourse; IX. about anesthesia, divided into no anesthesia. Local anesthesia. Intravenous anesthesia, mainly according to the individual’s sensitivity to pain to choose; X. Cost. Local anesthesia about a dry, intravenous anesthesia about 2 to 3 thousand dollars; xi. pre-operative examination. White belt. Routine blood. ECG gynecological examination, >40 years old chest X-ray, HCG check if necessary.