HOME >> BIOLOGY >> NEWS
New findings confirm male fertility declines with age

Further evidence that men's fertility declines with age is reported today (Thursday 6 February) in Human Reproduction[1] Europe's leading reproductive medicine journal.

A study of 97 healthy non-smoking men aged from 22 to 80 has demonstrated that, as they age, men's semen quality declines. There was a continuous reduction in sperm motility (movement) and semen volume and the proportion of men with abnormal semen volume, sperm concentration and motility increased significantly across the age decades.

The research, from a team in California, confirms that men as well as women have a biological clock even though it may not start ticking as abruptly as women's.

One of the lead researchers, Dr Brenda Eskenazi, Director of the Center for Children's Environmental Health Research at the University of California at Berkeley, said: "We measured semen volume, sperm concentration, sperm motility and progressive motility (the ability of sperm to move forward) in men with no known fertility problems and we found significant age-related decreases in semen quality, most notably for semen volume and sperm motility.

"However, unlike women, there appears to be no evidence of an age threshold, but rather a gradual change over time. Because semen quality is generally considered to be a proxy for fertility our findings suggest that men may become progressively less fertile as they age.

Over a quarter of cases of infertility are known to be due to male factors. Dr Eskenazi, who is Professor of Maternal and Child Health and Epidemiology, said that understanding the effect of male age on fertility had become increasingly significant in public health as a growing number of men are choosing to father children at older ages than in the past. In the USA, for example, the birth rate for fathers aged between 35 and 54 has risen by nearly a quarter since 1980.

Dr. Andrew Wyrobek, head of the Health Effects Genetics Division at Lawrence
'"/>

Contact: Margaret Willson
m.willson@mwcommunications.org.uk
44-153-677-2181
European Society for Human Reproduction and Embryology
5-Feb-2003


Page: 1 2

Related biology news :

1. International study findings link acne-like rash to effectiveness of new targeted cancer treatment
2. Virginia Tech researchers to release findings on Smith River Project
3. New HIV findings
4. Stanford researchers findings may shed light on common, deadly birth defect
5. Briggs takes to the molecular level Darwins findings on plants sensing the direction of light
6. Latest findings on PCBs to be subject of June workshop at Illinois
7. Chlamydia in men now also linked to infertility new findings
8. New MS research shows remarkable findings
9. Scientists findings may lead to better understanding of how that sleep develops, matures
10. New findings are a window into the late stages of Lou Gehrigs disease
11. New findings bring mixed blessings to those looking to combat jet lag

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: New findings confirm male fertility declines with age

(Date:7/22/2014)... genus of planthopper known as Conosimus, which now includes ... in the southern part of the Iberian Peninsula in ... appears in the open-access Journal of Insect Science ... Conosimus baenai , has been named after Manuel ... taxonomy of Iberian Hemiptera. , Conosimus baenai ...
(Date:7/21/2014)... 2014 (Toronto) As part of a multinational, collaborative ... Health (CAMH) have helped identify over 100 locations in ... schizophrenia, in what is the largest genomic study published ... online in Nature , point to biological mechanisms ... to new approaches to treating the disorder, which has ...
(Date:7/21/2014)... of Middle East Respiratory Syndrome coronavirus (MERS-CoV) in the ... the virus. The work, published this week in ... Society for Microbiology, indicates that further studies are needed ... the air. , MERS, a serious viral respiratory illness ... people as of June 11, according to the World ...
Breaking Biology News(10 mins):International team sheds new light on biology underlying schizophrenia 2International team sheds new light on biology underlying schizophrenia 3Middle East Respiratory Syndrome coronavirus detected in the air of a Saudi Arabian camel barn 2
(Date:7/21/2014)... July 21, 2014 Lawrence ... Investment Board (WIB) and Las Positas College (LPC) ... technical education and hands-on training for veterans, officials ... Program at Las Positas is designed to ... for engineering technician careers, and establishes a pipeline ...
(Date:7/21/2014)... (July 21, 2014) The yield so far is ... developed a low-energy, solution-based mineral substitution process to make ... use in electronics and alternative energy devices. , A ... of the July 21 issue of the journal ... research in the inorganic and nuclear chemistry fields. The ...
(Date:7/20/2014)... the process releases radioactive krypton and xenon gases. Naturally ... gas radon. A new porous material called CC3 effectively ... Nature Materials shows how: by breathing enough ... , The CC3 material could be helpful in removing ... air in buildings and also in recycling useful elements ...
(Date:7/18/2014)... LANSING, Mich. , July 18, 2014  Neogen ... Stephen Snyder , Neogen,s chief operating officer and ... said he will work as a consultant going forward ... Snyder has been in this position since ... be fulfilled by James Herbert , who has ...
Breaking Biology Technology:Engineering Program Established for Veterans 2Engineering Program Established for Veterans 3Oregon chemists eye improved thin films with metal substitution 2A noble gas cage 2A noble gas cage 3
Cached News: