Navigation Links
Obese men have less semen, more sperm abnormalities, and should lose weight before trying for a baby
Date:7/9/2008

This release is available in Spanish.

Obese men should consider losing weight if they want to have children, a scientist told the 24th annual conference of the European Society of Human Reproduction and Embryology today (Wednesday 9 July). Dr. A Ghiyath Shayeb, from the University of Aberdeen, Aberdeen, UK, said that his research had shown that men with a higher body mass index (BMI) had lower volumes of seminal fluid and a higher proportion of abnormal sperm.

Dr. Shayeb and colleagues looked at the results of seminal fluid analysis in 5316 men attending Aberdeen Fertility Centre with their partners for difficulties in conceiving. 2037 of these men had complete data on their BMIs. "We felt that it was possible that male overweight might contribute to fertility problems," he said, "particularly since it is a known risk factor for problems in conceiving among women."

The scientists divided the men into four groups according to their BMI, from being underweight to being considerably overweight. Taking into account other characteristics that could confound the analysis, such as smoking, alcohol intake, age, social deprivation, and the length of time of abstinence from sex prior to producing a semen sample for analysis, they looked for a relationship between BMI and semen quality. The analysis showed that the men in Group B, who had an optimal BMI (20-25, as classified by WHO), had higher levels of normal sperm than those in the other groups. They also had higher semen volume. There was no significant difference between the four BMI groups in sperm concentration or motility.

The researchers did not look at DNA damage in the sperm, preferring to look at the parameters of the routine semen analysis, which all men attending the fertility centre will have at least once. "Other studies have suggested an association between male obesity and increased DNA damage in the sperm, which can be associated with reduced fertility as well," said Dr. Shayeb.

"Our findings were quite independent of any other factors," he said, "and seem to suggest that men who are trying for a baby with their partners, should first try to achieve an ideal body weight. This is in addition to the benefit of a healthy BMI for their general well being.

"Adopting a healthy lifestyle, a balanced diet, and regular exercise will, in the vast majority of cases, lead to a normal BMI. We are pleased to be able to add improved semen quality to the long list of benefits that we know are the result of an optimal body weight."

The team intends to follow up their research by comparing male BMI in fertile and infertile couples to see if the poorer semen quality correlates with reduced fertility. "There has been a significant rise in the numbers of men with poorer semen parameters in the industrialised world," said Dr. Shayeb, "but this has not been reflected so far in male infertility. To compare male BMI in these two groups therefore seemed to us to be a logical next step."

Further research is also needed on exactly how obesity affects semen production, said Dr. Shayeb. "The mechanism for the relationship could be a number of things different hormone levels in obese men, simple overheating of the testicles caused by excessive fat in the area, or that the lifestyle and diet that leads to obesity could also lead to poorer semen quality. We just don't know the answer yet, but this is an important question that needs urgent attention."


'/>"/>

Contact: Mary Rice
mary@mrcommunication.org
34-932-308-810
European Society for Human Reproduction and Embryology
Source:Eurekalert

Related biology news :

1. Studies: Children obese due to a host of unhealthy pressures
2. Drug dosages often incorrect for obese patients
3. Primate sperm competition: speed matters
4. Mutant sperm guide clinicians to new diseases
5. Wiggle room: Cornell researcher borrows idea from sperm to provide energy for nanoscale robots
6. Normal-looking sperm may have serious damage; scientists urge more care in selection
7. Diabetes linked to male infertility; excess sugars in the body have direct effect on sperm quality
8. BMI criteria for obesity surgery should be lowered, UT Southwestern researcher suggests
9. Fisheries should be regarded as a part of the maritime environment
10. Should children be permitted to get genetic testing for BRCA 1/2 mutations?
11. Backpack straps can decrease blood flow in the shoulder and arm
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/13/2017)... 2017 According to a new market research report ... Identity Administration, and Authorization), Service, Authentication Type, Deployment Mode, Vertical, and Region ... expected to grow from USD 14.30 Billion in 2017 to USD 31.75 ... ... MarketsandMarkets Logo ...
(Date:4/11/2017)... BROOKLYN, N.Y. , April 11, 2017 /PRNewswire-USNewswire/ ... identical fingerprints, but researchers at the New York ... University College of Engineering have found that partial ... fingerprint-based security systems used in mobile phones and ... previously thought. The vulnerability lies in ...
(Date:4/5/2017)... Allen Institute for Cell Science today announces the launch ... dynamic digital window into the human cell. The website ... deep learning to create predictive models of cell organization, ... suite of powerful tools. The Allen Cell Explorer will ... resources created and shared by the Allen Institute for ...
Breaking Biology News(10 mins):
(Date:7/26/2017)... , ... July 25, 2017 , ... ... media and software solutions that enable short-run digital printing, is proud to announce ... and its free GHS Wizard online software available at avery.com/GHS . The ...
(Date:7/26/2017)... ... 2017 , ... Provia Laboratories announces the launch ... and development of human cells and tissues for therapeutic use. Provia’s state of ... Administration’s (FDA) Current Good Manufacturing Practices (cGMP) guidelines and provides contract services related ...
(Date:7/26/2017)... ... July 26, 2017 , ... ... for the improvement of crop productivity and economics for the food, feed and ... scope of the agreement includes the research and development of microbiome-based seed treatments ...
(Date:7/25/2017)... ... July 25, 2017 , ... ... and improve efficiency of livestock farming while reducing the use of antibiotics and ... intellectual property from Cornell University. , These new proprietary technologies expand the ...
Breaking Biology Technology: