Sterilisation should only be considered by women who do not want any more children, or do not want children at all. Once you are sterilised it is very difficult to reverse the process, so it's important to consider the other options available before making your decision.
Having a vasectomy should always be viewed as permanent sterilisation. This is because, although reversal is sometimes possible, it may not be successful. A reversal operation requires delicate microsurgery to join the tubes together again. Even with a successful operation, it still may not be possible to father a child.