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Test ID: POSV    
Post Vasectomy Check, Semen

Useful For Suggests clinical disorders or settings where the test may be helpful

Determining absence or presence of sperm post vasectomy

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

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.

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Zero sperm seen

Interpretation Provides information to assist in interpretation of the test results

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.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

No significant cautionary statements.