The only difference is that your semen will no longer contain sperm. As before, the body naturally absorbs unused sperm. Sperm can remain in the vas deferens above the operative site for weeks or even months after vasectomy. You will not be considered sterile until two post-surgical semen tests have shown that no sperm remain. Until then, you must continue to use other birth control to prevent pregnancy.
All contraceptive methods carry some risk as well as benefits.
Vasectomy is a very low risk procedure, but complications are possible. No-scalpel vasectomy, reduces their likelihood because the blood vessels responsible for bleeding are less likely to be affected and because the opening in the scrotum is so small. Another potential risk is failure . Even when the operation is performed perfectly, it is possible in rare cases for sperm to find its way across the void between the two blocked ends of the vas deferens. This situation, called recanalization, is highly unusual but does occur.