Laparoscopic sterilisation This is a common method of female sterilisation and is usually done under general anaesthetic. Two or three very small cuts are made in the abdomen. The abdomen is filled with a carbon dioxide gas, which allows the organs inside to be seen clearly. A laparoscope (medical telescope) is inserted through one small opening to locate the Fallopian tubes. The tubes are then blocked by heat sealing, clips, clamps or rings.