#surgical_contraception  contraception by surgical sterilization
  supertype:  sterilisation  contraception
  subtype:  tubal_ligation__tuballigation  a sterilization procedure with women; both Fallopian tubes are tied in two places and the tubes removed in between the ligations
  subtype:  vasectomy  surgical procedure that removes all or part of the vas deferens (usually as a means of sterilization); is sometimes reversible

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