Medical term for a surgical procedure that makes a person or animal unable to reproduce. Used in formal and clinical contexts.
彼女は不妊手術を受けることに決めた。
She decided to undergo sterilization surgery.
不妊手術は避妊のための恒久的な方法です。
Sterilization is a permanent method of contraception.
不妊手術 is the broader medical term for sterilization surgery in either sex, while 去勢 specifically refers to removal of the reproductive organs (usually testes).
forced sterilization; involuntary sterilization
Compound of 不妊 (infertility) and 手術 (surgery). The term is a direct medical borrowing from the concept of sterilization surgery.