Quick Index
 Adult Industry News
Search AINews Database
Type Keyword or Phrase Here
Are you TOUGH ENOUGH for Joanna Angel? EXPO 2014, August 24-27, Mandalay Bay, Las Vegas
   
 

Front Page
Film News
Media News
Business News
Clubs & Appearances
Law & Politics
Internet & Mobile News
Lifestyles Arts Health Charity
Letters to the Editor
Columns
Movie Spotlight Reviews
Interviews
Pornstar Pages
AINews Staff
Ad Rates
PR 101: Press Release Service

Caliente Nudist Vacations!

Kayden Kross at Twistys

April 26, 2004 08:30am
Viagra May Impair Sperm's "Warhead" Aim
Source: iol.co.za
by: Science & Tech News

(BELFAST, IRELAND) -- Men who use the anti-impotence drug Viagra could be impairing their fertility, according to scientists.

Laboratory experiments indicate the drug can damage sperm. Scientists are now warning younger men to use caution before taking the drug recreationally.

Researchers from Queen's University in Belfast found that sperm exposed to Viagra became more active.

But at the same time a mechanism used by sperm to penetrate the egg wall during fertilization was greatly speeded up.

"Caution should be taken when using recreational drugs if you are hoping to start a family"

Known as the "acrosome reaction", it involves firing an armour-piercing warhead of digestive enzymes at the egg.

If the sperm release their "ammunition" too early, before reaching the egg, they do not get another shot and are rendered infertile.

The study showed that this was likely to happen to sperm exposed to Viagra.

Dr Sheena Lewis, director of the Reproductive Medicine Research Group at Queen's said: "The fact that this sperm function is impaired by the presence of Viagra is worrying."

The scientists, who presented their findings at the British Fertility Society's recent annual conference in Cheltenham, studied 45 samples of human semen.

Half were treated in the laboratory with a dose of Viagra equivalent to the amount in the blood of a man who has taken a 100mg pill.

These sperm were found to be more motile than untreated sperm - they had more energy and moved around more.

This would normally be considered a positive effect, since sperm motility is linked to fertility.

But the extra energy given to the sperm also seemed to speed up the acrosome reaction. Most of the untreated sperm spontaneously released their acrosome enzymes after about three hours.

However sperm exposed to Viagra released theirs' after only one hour. Although no attempt was made to fertilise eggs, this was too fast to have allowed successful fertilisation in a real life situation.

"We measured them after one hour and 79 percent more of the sperm exposed to Viagra had acrosome reacted," said Lewis.

The findings were supported by the results of tests on mice which showed that Viagra impaired their ability to father offspring. Significantly fewer eggs were fertilised when females mated with males given the drug.

In other cases, embryo development stopped early, indicating that more processes may be involved than simply the ability of a sperm to penetrate an egg.

Lewis said the acrosome reaction involved the channelling of charged calcium atoms, or ions. This was known to influence numerous cellular mechanisms and could effect early embryonic development.

Lewis said: "When Viagra came out in 1998 it was aimed at men with impotence problems, primarily older men not interested in having children. Now it has become a very popular drug for sexual enhancement.

"I think the message we want to get across is that caution should be taken when using recreational drugs if you are hoping to start a family."

Her group had also conducted research which indicated that smoking cannabis could impair fertility. - Sapa-DPA

Are you TOUGH ENOUGH for Joanna Angel?

Related Stories

Related Sites - WARNING! Graphic Content

RavenBay02.3gp

See BiBi Jones at Digital Playground

Top Stories

AINews: Skow Among Best

Heaven & Hell Halloween Party

These Things We Do ~ Reviewer Rated

Farrah Abraham at Hustler Hollywood

Sex Workshop Hustler San Diego

Halloween Art Show

O Awards Pre-Noms Open

Trophy Girl Casting Call

Cum in Me Baby 4 ~ Reviewer Rated

More Phoenix Mainstream

BoodiGo Partners PornGuardian

BoodiGo Supports ASACP

BoodiGo Blocks Child Porn

Boodigo Adult Search Engine

AVN Show Discounts End Today

Inside The Industry 10/08/2014

Amber Lynn at Wasteland

Nikki's Fit as Phoenix

Vivid Extends Patrick Hosting

Fake Test Results

Angelyne on Amber Lynn's RNSU

Red Cardinal Wraps Betrothed

Siri Wins Round 2

J.Lo Doc Johnson Offer

Stripclub Microbrewery on CNN

Father's Day ~ Reviewer Rated

Our Father ~ Reviewer Rated

Nikki Phoenix Album Released

Passport to Hustler Event

Fox News Wasteland

Asianmodelpalooza 14

Nikki Phoenix Appearances

Nikki Phoenix Karaoke XXX

Nina Elle Retains Star Factory

Tasha Reign Grads UCLA

Tera Patrick Hosts Vivid Radio

It's Just Work

Traci Bryant Goes Legal

CET Free Panel Month

Miss LA Karaoke XXX

Freedom Acres Location

Summer Lovers

Nikki Delano at Centerfolds

Karen Summer Returns

Advertise on AINews

Cytherea Auctions Fan Scene

Entertainment is Entertainment is Entertainment

More
Stories From

Lifestyles Arts Health Charity

Halloween Art Show

Sex Workshop Hustler San Diego

Fake Test Results

CET Free Panel Month

TTS Welcomes Bobi & Jen

Cutting Edge Changes Staff

Next Day Test in LV

Condomless Sex

Fetish Con Dates

Gloria Leonard Memorial

Valentine's Tips

Kinky Valentine Cards

Dammit He's Dead

Death at Bunny Ranch

Sara Jay not Dead

Glory Stories Batts Fundraiser

Daisy Marie hosts Philippines Relief

Fairvilla Movember Bash

Nadia Night Back From Rehab

Altar dedicated to Guccione

Alex Gonz Hep C Statement

CSC Preserves AIDS Poster

Bible Study with Kurt Lockwood

CineKink Screens at BedFEST

Shibari Speaks at Woodhull

Baci Launches Halloween Contest

ASACP to London XBIZ EU

Wicked Heads AIDS Walk

Yahshua Seeks Help

Alesia Pleasure at Bare Bowling

LATATA Hep C Statement

Bare Bowling is Back

LATATA Advises Performers

drake Leads AIDS Walk

CineKink in Oakland

CineKink Kicks Off

Vice is Nice Charity Event

CineKink 2013 Tour Dates

Simone Takes Art World

Sandau Scholarship Fund Established

1000 Bras to Tornado Victims

Paris Kennedy Sanctuary Sessions

CatalystCon West Pre-Con Events

Wrestle Erotica Celebrity Fundraiser

Sexploitation Documentary

CET Screens for Hep

Rockstar Mayhem Festival Update

Priya Rai Retirement, Engagement

Superman Super Show

Monet Helps Hurricane Victims

Deep Throat Sex Scandal Movie

Ropes with Julie Simone

Gamelink to Senator Robert Ford

CatalystCon Speakers, Sponsors

Bondage Ball Hollywood

Sportsheets at Pride Event

Toga Lifestyle Party

Domcon LA This Week

Kurt Lockwood at Ice House

2013 Masturbate-a-Thon

Angel Sponsors AIDS Research

     
Copyright © 1998 - 2014 Adult Industry News (AINews.com)
All materials constituting text, articles, press releases, stories, columns, photographs, graphics, and code on the AINews.com domain are protected by copyright, and either owned by Adult Industry News (AINews.com), or reproduced with permission from other copyright owners. It may be downloaded and printed for personal reference, but not otherwise copied, altered in any way, or transmitted to others, without the written permission of Adult Industry News (AINews.com).