HOME >> BIOLOGY >> NEWS
New study of healthy men finds semen quality decreases with age

Berkeley - With each passing year, semen quality in adult men declines, suggesting that age plays a greater role in male fertility rates than previously thought, according to a new study by researchers at the University of California, Berkeley, and Lawrence Livermore National Laboratory.

The study, published Thursday, Feb. 6, in the journal Human Reproduction, suggests that even healthy men may become progressively less fertile as time goes by.

"Prior studies on semen quality typically included men who came to fertility clinics," said Brenda Eskenazi, professor of epidemiology and maternal and child health at UC Berkeley's School of Public Health, and co-author of the study. "This is one of the first studies to focus on men with no known fertility concerns, giving us a better sense of whether age affects semen quality in a healthy population."

The researchers recruited 97 men between the ages of 22 and 80 who were employed or retired from Lawrence Livermore National Laboratory. Samples were brought to the onsite research laboratory within two hours after collection to accurately measure sperm motility - its liveliness and direction of movement - and other indicators of semen quality. The researchers gathered extensive medical, lifestyle and occupational exposure history from the men, and excluded those who had smoked in the prior six months or had other relevant health problems.

While age had an effect on semen volume, the more significant impact was on sperm motility, which researchers found decreased by 0.7 percent per year. That means the chance of sperm motility being clinically abnormal is 25 percent at age 22, 40 percent by age 30, 60 percent by age 40 and 85 percent by age 60.

"Simply put, sperm slow down with age," said study co-author Andrew Wyrobek, head of the Health Effects Genetics Division at Lawrence Livermore National Laboratory. "In addition, age impacts progressive motility, which is the ability of sperm
'"/>

Contact: Sarah Yang
scy@pa.urel.berkeley.edu
510-643-7741
University of California - Berkeley
5-Feb-2003


Page: 1 2 3

Related biology news :

1. Student science contest participation influences study, career choices, alumni say
2. New study shows hope for treating inhalant abuse
3. International study findings link acne-like rash to effectiveness of new targeted cancer treatment
4. Cigarette smoke causes breaks in DNA and defects to a cells chromosomes, Pitt study finds
5. New study indicates arsenic could be suitable as first-line treatment in type of leukaemia
6. Phase II trials of second-generation antisense cancer drug planned following successful early study
7. Preclinical safety study shows adipose-derived stem cells improve heart function after heart attack
8. Indiana University, EPA to study airborne PCBs
9. K-State, other universities to study how climate affects plant evolution
10. USC study links historical increases in life span to lower childhood exposure to infection
11. Washington University in St. Louis leads group studying aging process

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/25/2019)... ... September 25, 2019 , ... LeadingBiotech ... and dialogue, today announces its inaugural South CEO conference to be ... , Co-produced by Tulane University, this invitation-only meeting convenes biopharma executives to ...
(Date:9/24/2019)... ... September 24, 2019 , ... ... interactions for accelerated drug development, announced today that it has raised $2.8M from ... OS Fund and also includes AME Cloud Ventures, Boom Capital, Madrona Venture Group, ...
(Date:9/17/2019)... ... September 17, 2019 , ... Last week, Blackrock Microsystems, ... from the Medical University of Warsaw, met at the Presidential Palace of the ... a neuroprosthetic system as part of an initiative called "Startups in the Palace ...
Breaking Biology News(10 mins):
(Date:10/10/2019)... ... October 10, 2019 , ... R3 Stem Cell announces it has ... October 18-19th, 2019 in Las Vegas with spots still open. , The speaker, Dr. ... several Ivy League universities including Cornell, Harvard and Dartmouth. He currently serves as the ...
(Date:10/8/2019)... ... October 08, 2019 , ... Today, Massachusetts stem cell biotechnology company Asymmetrex ... Like the company’s precursor patent, approved in the U.S. in 2017, the new patent ... Asymmetrex now markets the technology in the U.S. as the AlphaSTEM Test™. ...
(Date:10/3/2019)... Calif. (PRWEB) , ... October 02, 2019 , ... ... business opportunity to investors and venture capital companies in Silicon Valley at a special ... 8:30 pm. The event will be held at the JJ Lake Business Center located ...
(Date:9/30/2019)... ... September 30, 2019 , ... The September ... Rigaku Corporation , is now available online on the company’s global website. The ... including X-ray diffraction, fluorescence and imaging, and presents articles, scientific papers and news ...
Breaking Biology Technology:
Cached News: