A small part of the vas deferens is removed or tied up through a small incision on the scrotum.
Although sperm production continues in the testes, sperm can no longer reach the exterior.
Testosterone levels in the blood decline because the blood vessels are cut during the surgery.
Vasectomy has no effect on sexual desire or performance and ejaculation would occur during coitus.
Testosterone levels in the blood remain normal because the blood vessels are not cut during the surgery.