I am 42 aged. My wife is of 40 age. We have 2 children. My wife had gone through tubectomy, 10 years back. Last couple of months, she was troubling with a short duration(18 to 25 days) periods with little excess of bleeding . But last month, she did not get menses at all. So far it is 40 days, since her last menses. Now. we have the fear, about her pregnancy. Because, we don t want it. Please clarify me.