Hysteroscopy can be used for diagnostic but also for surgical purposes. In both cases, the doctor looks inside the uterus with a special endoscope that is inserted through the vagina and cervix. The uterus is unfolded with a fluid during the procedure for better visibility. In diagnostic hysteroscopy, the shaft that allows the doctor to look is only three millimeters thick. A uterine specimen can possibly identify the causes of bleeding disorders and changes to the uterus skin (Endometrium) or fibroids are also visible.