What is a Vasectomy?  Bilateral vasectomy is an operation, which is performed to remove the sperm from the semen and results in sterilization in the male. The vas deferens (vas) is a tube that carries sperm from the testicle. It courses up through the groin and then down to the prostate gland at the bottom of the bladder. In a vasectomy, the vas from each testicle is divided near the upper portion of the scrotum.  This prevents sperm from entering the semen during sex. More about Vasectomy...