Sterilization is defined as the termination of the ability to produce offspring.

■■ A vasectomy is a surgical procedure performed on men in which the vas deferens is severed and tied to prevent the flow of seminal fluid into the urinary canal.

■■ A tubal ligation is a surgical procedure performed on women in which the fallopian tubes are cut and tied. This prevents the passage of the ovum from the ovary to the uterus.

■■ Therapeutic sterilization is performed to preserve life or health.

■■ Eugenic sterilization is the involuntary sterilization of certain categories of persons.

It is often performed to prevent the transmission of hereditary defects and, in some states, is performed to prevent procreation by persons who would not be able to care for their offspring.