<prompt> A case of vasectomy is said to have failed as the vasectomised persons wife gives bih to a child ten months after the operation. Which one of the following is the most probable cause?Failure of the husband to use condom after vasectomySurgical failureRecannalisationWife had extramarital contact  <response>: Ans. is b i.e., Surgical failure o It is the case of surgical failure as pregnancy occured immediately after surgery delivery occured 10 months after surgery o Recanalization occurs after sometime of successful surgery. Women become pregnant 16 months to 3 years after surgery that means delivery will occur 9 months later to this period. 