PCOS is the commonest endocrinopathy in women and the commonest cause of unovutation in infertile couples. The role of endoscopy in the diagnosis and treatment of PCOS is well know. With laparoscopy we can see PCOS ovaries differentiate other causes of infertility such as tubal problems or pelvic adhesion. With hysteroscopy we can see abnormal endometrial growth or polyps and we can do endometrial biopsy. Beside diagnostic aid endoscopy can be used in the treatment of PCOS. In these cases we can do ovarian drilling with diathermy Laser crayon or hot water. And with this technic we induce ovutation regulate the menstrual periods and increase the pregnancy rate.