Can a vasectomy come undone after 20 years of being fixed on its own?

Based on your description you would be discussing someone who had a vasectomy that was initially successful but a pregnancy much later on occurred. Almost all recurrences occur within the first 2 to 3 years of having had a vasectomy. For a vasectomy to fail over longer periods of time are extremely rare.

Published on Jul 11, 2012

Yes, but the likelihood is very low. Across the board the recanalization rate is about 1/2000 and I would think this number diminishes even more the longer the time from the vasectomy. Any thing is indeed possible and you can verify sterility by having a semen analysis performed.

Published on Jul 11, 2012