This is a question that I often get asked by my patients in the course of my clinic, so I wanted to write this article to tell you about it today. The main purpose of hysteroscopy is divided into two categories, one is to identify any abnormalities in the uterine cavity, and the other is to perform a therapeutic procedure. Generally, if ultrasound examination reveals the possibility of uterine adhesions and endometrial polyps, the doctor will recommend hysteroscopy to clarify the presence of these conditions. In addition, there are some endometrial inflammatory diseases that are difficult to see under ultrasound, so doctors will also perform hysteroscopy to clarify if other diseases are highly suspected. Another thing we do more often now is to perform hysteroscopy for patients who have repeatedly failed transplants to clarify whether there are abnormalities in the uterine cavity in order to increase the probability of the next pregnancy. Another type of hysteroscopic procedure of a therapeutic nature. The main outpatient procedure is hysteroscopic tubal lavage, mainly for the treatment of patients with proximal tubal obstruction suggested by tubal iodine oil angiography. Hysteroscopy requires that you come to the hospital for examination when you are 1 to 2 days clean of menstruation and cannot have sex. Generally, you have to do the four preoperative items, blood routine, coagulation function, white belt routine and electrocardiogram, etc. After the examination is normal, you can make an appointment for hysteroscopy, because there are more patients for hysteroscopy in our hospital, so you usually need to make an appointment for 2 to 4 days before you can have the operation, so you must come to the hospital early.