Dear Sethuraman Ramasubramanian,
is a method of permanent sterilization
in males...in this the vas deferens is tied to prevent release of sperms.
And after the operation, the sperm which are produced by the testes are not getting collected..instead they are broken down and absorbed by the body.
The operative procedure is safe...and with newer methods like No Scalpel Vasectomy, one can start his daily activities from the next day onwards.
There is no interference with the potency of the individual.
In fact studies have shown that the sexual desire & performance has improved as there is no risk of pregnancy
So...there is no need to worry.
Wishing you a Healthy life.
Thanks & take care.