Men Sterilisation What Are The Repercussion?

I am married with 2 kids and an expecting baby. I've been married for about 6years now and I'm 33years old now. I want to stop child bearing at the age of 36years and my wife complains of almost all the contraceptive methods known (we even tried one and it fails). This time around I want to be responsible for my action, therefore I want my wife to be left the hook. Soo I Want to sterilise myself at 36. Dear Nairalanders what are your comments?