Sterilisation is a good alternative to other types of contraception when a couple are absolutely sure that they do not want to have more children. For women, the operation is done under general anaesthetic and the Fallopian tubes are either closed or cut. This is done by keyhole surgery, whereby the surgical instruments enter the body through a small cut in the skin. The woman will still have her normal period after the surgery. It is easier to sterilise men. For men, the surgery is done while awake, under local anaesthetic. Two small cuts are made beside the scrotum and the spermatic cord is cut. Even after sterilisation, the semen appears the same, a microscope has to be used to see if the semen contains any sperm cells.