How Often Does Recanalization Occur

This situation suggests that recanalization can occur at any time after vasectomy and not only a few weeks after vasectomy as observed in our study. However, late recanalization is believed to be a very rare phenomenon occurring in only about one out of 2000 to 3000 men [26–28].

How common is recanalization?

Early failure or recanalization of the vas deferens after vasectomy occurs in approximately 0.3% to 0.6% of cases. This failure occurs when a substantial number of spermatozoa or any motile spermatozoa are identified at least 4 months after vasectomy.

How often do vasectomies fail after 5 years?

A common recommendation is to have semen analysis performed three months after vasectomy or after 20 ejaculations and to avoid intercourse or use another birth control method until no sperm has been documented. Researchers estimated that around one in 100 vasectomies would fail within one to five years of surgery.