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96 percent of vasectomy patients cleared without need for multiple semen samples
Date:6/8/2010

Having to provide repeated semen samples following a vasectomy could soon be a thing of the past, after 96 per cent of men were given the all-clear based on a single test three months after surgery.

Research from The Netherlands, published in the June issue of the urology journal BJUI, showed that 51 per cent of the 1,073 samples contained no sperm and a further 45 per cent contained less than 100,000 immotile sperm. No paternity was reported in the cleared group after a follow-up of at least a year.

"Vasectomy is a minimally invasive surgical procedure that provides a widespread, reliable and relatively easy method of birth control" says co-author Dr Herman van Roijen from the Department of Urology at St Elisabeth Hospital, Tilburg, The Netherlands.

"One of the major drawbacks is that a considerable number of men still have a few immotile sperm in their semen for a year or more. Conventional guidelines have stated that clearance can only be given to men who provide one or two sperm-free samples. The fear of legal action if pregnancy does occur has led to very conservative vasectomy protocols.

"However, our study based on guidelines issued by the Dutch Urological Association shows that one semen test is adequate to provide clearance in the vast majority of cases."

A two-step process was developed by the research team to analyse the semen samples.

  • The first step was wet slide analysis of the semen samples in a deep chamber to provide a relatively reliable indication of sperm numbers and motility. This showed that 51.2 per cent of the samples were sperm free and 41.5 per cent contained less than 50 immotile sperm, giving an initial clearance rate of 92.7 per cent.

  • The remaining 7.3 per cent were then tested using a Neubauer Haemocytometer, according to guidelines issued by the World Health Organization. This resulted in a further 3.3 per cent being cleared and four per cent be
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Contact: Annette Whibley
wizard.media@virgin.net
Wiley-Blackwell
Source:Eurekalert

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