Vasectomy is a safe and effective method of contraception for men. Post vasectomy semen analysis (PVSA) is recommended to confirm clearance of stored spermatozoa and also to identify rare cases of early recanalization or technical failure. Sterility is usually confirmed after a single post vasectomy seminal fluid is clear of spermatozoa. However if spermatozoa are present a second sample must be provided to the lab within 1 hour of production to assess motility. If sperm are present in the second sample a third sample may be recommended which will be sent to a suitable clinic specialising in reproductive medicine.
Sperm motility will be reported in specimens received within 4 hours of sample production, where motile or non-motile spermatozoa are identified in the initial sample preparation.
Spermatozoa motility will not be reported by the laboratory if spermatozoa are only identified in the centrifugate preparation. This is due to the centrifugation process, which may result in previously motile spermatozoa being rendered non-motile. In these instances the report will state ‘spermatozoa present’ with no comment on motility. It is recommended that these patients provide a second sample to the laboratory within 1 hour of production to assess motility.
For EASTERN service users, see HERE
For NORTHERN service users, see HERE
For further advice and result interpretation please contact:
Dr Mark Watson (MBChB, MRCGP, DRCOG, GPxSI (vasectomy), Trainer in Vasectomy under LA) at St Thomas Health Centre, Exeter on 01392 676676.
PVSA samples can either be requested via GPOCS or using a request form.
Specimen Labelling Procedure