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 December 22, 2014 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 December 22, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Touch-Free Smart Phone Empowers Mobility-Impaired

Touch-Free Smart Phone Empowers Mobility-Impaired

Reuters - Innovations Video Online (Dec. 21, 2014) A touch-free phone developed in Israel enables the mobility-impaired to operate smart phones with just a movement of the head. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
Powered by NewsLook.com
Hugging It Out Could Help You Ward Off A Cold

Hugging It Out Could Help You Ward Off A Cold

Newsy (Dec. 21, 2014) Carnegie Mellon researchers found frequent hugs can help people avoid stress-related illnesses. Video provided by Newsy
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