Is it still possible to have a child after vasectomy?

Even after a reversal, his fertility may not be very good. Because the procedure breaches the blood/testis barrier , many men after a vasectomy develop anti-sperm antibodies that attack their sperm as if they were an infection. The longer the time since vasectomy the less chance of fertility. This does not mean it is impossible though. There is a technique called sperm aspiration that may be helpful. It is expensive though