Post vasectomy semen checks
There is an information booklet for patients: Vasectomy
Semen Analysis, which can be found in the
related media section of our website.
The first semen specimen should be passed at least 16 weeks
after the vasectomy operation and after producing at
least 24 ejaculates. The second semen specimen should be produced
at least two weeks after the first specimen.
Post-vasectomy checks are necessary until two consecutive specimens
are free from sperm. These instructions are based on the British
Andrology Society Guidelines 2002.
As a fresh sample is essential for this test it must be
brought to the laboratory within four hours of it being passed at
Sexual abstinence should be three to four days prior to providing
The sample must be obtained by masturbation (manual stimulation)
and should be collected directly into the specimen container
provided. A condom and/or artificial lubrication must
not be used for semen collection, as it will kill
The complete specimen is needed for this examination, so if any of
the specimen is spilt, the laboratory must be informed and a repeat
specimen may be required.
The specimen container must be labelled with the
patient's full name, date of birth and the date and time the
specimen was passed.
The specimen should be brought directly to
Andrology by the patient within 4 hours
of it being passed.