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
European Society for Human Reproduction and Embryology

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:

(Date:11/4/2015)... York , November 4, 2015 ... a new market report published by Transparency Market Research "Home ... Growth, Trends and Forecast 2015 - 2022", the global home ... US$ 30.3 bn by 2022. The market is estimated ... forecast period from 2015 to 2022. Rising security needs ...
(Date:10/29/2015)... 29, 2015  The J. Craig Venter Institute (JCVI) ... Synthesis and Biosecurity: Lessons Learned and Options for the ... and Human Services guidance for synthetic biology providers has ... --> --> Synthetic biology ... potential to pose unique biosecurity threats. It now is ...
(Date:10/29/2015)... BOSTON , Oct. 29, 2015  Connected health ... phenomena driving the explosion of technology-enabled health and wellness, ... his new book, The Internet of Healthy ... apps, sensors or smartphones even existed, Dr. Kvedar, vice ... model of health care delivery, moving care from the ...
Breaking Biology News(10 mins):
(Date:11/30/2015)... Dec. 1, 2015  An interventional radiology technique shows promise ... preliminary results of a study being presented today at the ... America (RSNA). --> ... decades by interventional radiologists as a way to stop bleeding ... as a means of treating obesity is new. ...
(Date:11/30/2015)... /PRNewswire/ - Zenith Epigenetics Corp. ("Zenith" or the "Company") today ... to its Board of Directors to replace Dr. ... wealth of experience as co-founder of Resverlogix, with expertise in ... --> --> Dr. Wong remarked, "I am ... Zenith,s long standing expertise in epigenetics and the advanced stage ...
(Date:11/30/2015)... TapImmune, Inc. (TPIV), a ... peptide and gene-based immunotherapeutics and vaccines for the treatment ... be presenting at the 8 th Annual LD ... PM PT. Dr. John N. Bonfiglio a ... the presentation and will join TapImmune management in meeting ...
(Date:11/30/2015)...  Northwest Biotherapeutics (NASDAQ: NWBO ) ("NW Bio"), ... for solid tumor cancers, announced today that the Board ... the Company welcomes Neil Woodford,s call for ... internet report on NW Bio.  The Company,s Board is ... stated, "We agree with Mr. Woodford that, at ...
Breaking Biology Technology:
Cached News: