The purpose of tubal ligation is to prevent spermatozoa reaching the egg. Several methods obstructing the tubes are used to achieve this: division, ligation, placing a clip, or inserting a device into the tube.
The procedure is usually performed under general anaesthesia, by either coelioscopy or through the vagina. Tubal sterilisation is a very effective method, although it can fail. Patients should seek advice quickly if they miss their period, have abnormal bleeding, or abdominal pain.