OUTCOMES following vasectomy reversal vary considerably between surgeons, according to a large multi-institutional study that suggests 1-year semen analysis may provide the most reliable measure of procedural success.
Researchers analysed data from 4,568 men undergoing vasectomy reversal for fertility purposes across eight centres and 12 surgeons. The findings revealed substantial differences in postoperative patency and sperm concentrations, despite relatively similar preoperative patient characteristics.
The study combined prospectively maintained datasets with retrospective chart reviews, examining preoperative, operative, and postoperative factors. Primary outcomes were patency and sperm concentration 1 year after reversal.
Of the 4,568 patients included, 2,398 underwent at least two semen analyses, while 1,222 had at least one assessment more than 1 year after surgery.
At 1 year, patency rates ranged substantially between surgeons, from 54% to 93%, with a median across surgeons of 82%. Median sperm concentrations also varied markedly, ranging from 0–18.5 million/mL, with a median of 10.3 million/mL.
Researchers reported statistically significant differences between surgeons for almost every operative and postoperative factor examined. Rates of epididymovasostomy, a more complex form of vasectomy reversal, increased in line with the length of time since vasectomy.
Overall, sperm patency and concentrations tended to decline over time following reversal, although the pattern differed considerably between surgeons.
Unexpectedly, longer time since vasectomy appeared to be associated with better long-term patency in some analyses. However, the authors cautioned against overinterpreting this observation because of the retrospective nature of much of the data.
Patients who underwent semen testing more than 1 year after surgery also had poorer outcomes than those without later testing. According to the researchers, this could introduce selection bias, as patients experiencing poorer initial results may be more likely to continue undergoing semen analyses. Consequently, currently reported long-term outcomes may underestimate true success rates.
Importantly, semen testing at 1 year appeared to distinguish outcomes between surgeons more effectively than testing at earlier time points. Results were similar regardless of whether patency was defined using sperm concentration thresholds of greater than 0, at least 1 million/mL, or at least 5 million/mL.
The researchers therefore suggested that 1-year sperm outcomes may represent a preferable standard for defining vasectomy reversal success.
The findings highlight both the variability in outcomes following vasectomy reversal and the importance of longer-term follow-up when evaluating surgical success.
Reference
Lipshultz L et al. Vasectomy reversal outcomes and long-term kinetics: a multiinstitutional cohort. Fertil Steril. 2026;126(3):499–508.
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