A case of vasectomy is said to have failed as the vasectomised person&;s wife gives bih to a child ten months after the operation. Which one of the following is the most probable cause?
<p> Surgical failure is the reason . Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:509. <\p>
Failure of the husband to use condom after vasectomy
Surgical failure
Recannalisation
Wife had extramarital contact
Non communicable diseases