Clinical and Interpretive

This assay is used in determining absence or presence of sperm post vasectomy.

Following a vasectomy, sperm may be found in the semen for 6 weeks to 3 months or longer. Regular ejaculation (every 3-4 days) may eliminate sperm from the reproductive tract more quickly.

To check for the absence of sperm, semen should be evaluated for the presence of sperm 2 months post vasectomy and after a minimum of 10 ejaculations. Because the sperm count may be very low, the semen is centrifuged for concentration purposes.

A negative result from 2 consecutive specimens collected 2 weeks apart generally indicates contraception is not necessary. Occasional cases have been reported where there is intermittent presence of sperm in the semen. Recanalization or incomplete 1-sided transection may be the cause.

No sperm cells are anticipated. If present, their concentration and motility are reported.

A negative result from 2 consecutive specimens collected 2 weeks apart generally indicates contraception is not necessary. Occasional cases have been reported where there is intermittent presence of sperm in the semen. Recanalization or incomplete 1-sided transection may be the cause.