Hysteroscopy involves the insertion of a narrow telescope (the hysteroscope) through the neck of the womb and into the womb cavity. No cuts are required. To see the walls of the womb cavity clearly, the cavity is distended, most commonly using a liquid (e.g. saline). A camera attached to the hysteroscope is used to project the image of the womb cavity on to a television monitor thereby providing a very clear picture of the womb lining.