The timing of the hysteroscopy is somewhat optional, depending on what reason or disease it is being performed for. If you want to perform a hysteroscopic tubal insertion, you need to do it between 3-7 days after your period is cleared. If it is done in the middle or late period, there may be some damage to the lining of the uterus as it is thick. When there is abnormal bleeding, you can always check, because the bleeding does not know when the bleeding will stop, so, you can first carry out a hysteroscopy, local endometrial diagnostic scraping to help stop the bleeding. If it is to determine whether there are endometrial polyps, submucosal fibroids, you can also be examined about 7 days after the menstrual period is clean, which can help to rule out the presence of polyps, submucosal fibroids.