Featured Research

from universities, journals, and other organizations

96 percent of vasectomy patients cleared without need for multiple semen samples

Date:
June 8, 2010
Source:
Wiley-Blackwell
Summary:
Having to provide repeated semen samples following a vasectomy could soon be a thing of the past, after 96 percent of men were given the all-clear based on a single test three months after surgery. Fifty-one percent of the 1,073 samples contained no sperm and a further 45 percent contained less than 100,000 immotile sperm. No paternity was reported in the cleared group after a follow-up of at least a year.

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.

Related Articles


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 being declared potentially fertile.

A total of 481 men (44.7 per cent) received clearance with residual immotile sperm still present in their semen. After a follow-up of at least one year, no pregnancies had been reported.

"Our study clearly shows that three months after vasectomy about half of our patients were still producing sperm, albeit immotile and in very small numbers" says Dr van Roijen. "In fact, we found even higher percentages than previous studies.

"However, our study also showed that these residual sperm are of no clinical consequence."

The authors conclude that the era of repeated visits to a clinic to deliver yet another semen sample many months after a vasectomy may now be over.

"If the guidelines now being employed in The Netherlands were adopted elsewhere, it could dramatically increase the number of men who could be cleared three months after a vasectomy, having provided just one semen sample" says Dr van Roijen.


Story Source:

The above story is based on materials provided by Wiley-Blackwell. Note: Materials may be edited for content and length.


Cite This Page:

Wiley-Blackwell. "96 percent of vasectomy patients cleared without need for multiple semen samples." ScienceDaily. ScienceDaily, 8 June 2010. <www.sciencedaily.com/releases/2010/06/100608101021.htm>.
Wiley-Blackwell. (2010, June 8). 96 percent of vasectomy patients cleared without need for multiple semen samples. ScienceDaily. Retrieved February 26, 2015 from www.sciencedaily.com/releases/2010/06/100608101021.htm
Wiley-Blackwell. "96 percent of vasectomy patients cleared without need for multiple semen samples." ScienceDaily. www.sciencedaily.com/releases/2010/06/100608101021.htm (accessed February 26, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Thursday, February 26, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Sleeping Too Much Or Too Little Might Increase Stroke Risk

Sleeping Too Much Or Too Little Might Increase Stroke Risk

Newsy (Feb. 26, 2015) People who sleep more than eight hours per night are 45 percent more likely to have a stroke, according to a University of Cambridge study. Video provided by Newsy
Powered by NewsLook.com
London Show Dissects History of Forensic Science

London Show Dissects History of Forensic Science

AFP (Feb. 25, 2015) Forensic science, which has fascinated generations with its unravelling of gruesome crime mysteries, is being put under the microscope in an exhibition of real criminal investigations in London. Duration: 00:53 Video provided by AFP
Powered by NewsLook.com
Michigan Couple Celebrates Identical Triplets

Michigan Couple Celebrates Identical Triplets

AP (Feb. 25, 2015) A suburban Detroit couple who have two older children are adjusting to life after becoming parents to identical triplets _ a multiple birth a doctor calls rare. (Feb. 25) Video provided by AP
Powered by NewsLook.com
Mayor Says District of Columbia to Go Ahead With Pot Legalization

Mayor Says District of Columbia to Go Ahead With Pot Legalization

Reuters - News Video Online (Feb. 25, 2015) Washington&apos;s mayor says the District of Columbia will move forward with marijuana legalization, despite pushback from Congress. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins