1. A medical operation that makes it impossible for a male or female to produce or have babies. English = sterilisation.
2. A surgical operation that makes it impossible for a female to have or produce babies, by cutting or tying the fallopian tubes. Formal English = tubal ligation.
3. A surgical operation that is done in order to sterilise a man, by cutting the tube that carries sperm to his penis. English = vasectomy.