Chances of getting someone pregnant after four years of having a vasectomy that was cautorized on all ends. was given the all clear after the procedur?

Rare, but ...: Very rare, but not impossible since re-canalization of vas after vasectomy usually occurs within 6 months, but may later. In fact, electrocautery has been known to bear the best outcome for male contraception. In doubt, do semen analysis now for confirming if sperms are present in current semen. After childbirth, at times, laboratory sex identification is required. More? Ask doctor timely.