Posts Tagged ‘sperm’

Another danger to sperm: wi-fi laptops

Monday, December 5th, 2011

Males who place a laptop on their laps with the WI-FI on might have a greater risk of reduced sperm motility and more sperm DNA fragmentation, which could, in theory, undermine their chances of becoming fathers, researchers reported in the journal Fertility and Sterility this week.

This study was done in an artificial setting. The male participants were not tested with the laptops on their laps – semen samples were taken, placed under laptops for four hours, and then analyzed.

Previous studies had already shown that placing a laptop on a man's lap could potentially affect his fertility, especially if this occurs frequently and for long periods. The laptop can cause scrotal hyperthermia (elevated testicle temperature), which can considerably affect the quality of his sperm

In this new study, the authors explain that not only might the laptop-on-lap undermine semen quality, but also the Wi-Fi, if the laptop is near semen. They found that there was less damage when there was no Wi-Fi signal than when there was.

The double-whammy of the Wi-Fi signal and laptop temperature can cause:

  • A decrease in human sperm motility
  • Sperm DNA fragmentation – irreversible changes in the genetic code

Perhaps the electromagnetic radiation emitted by Wi-Fi damages the semen, the scientists suggested.

 

Good article on risks to men’s fertility

Tuesday, June 28th, 2011

I want to call to your attention a very informative article in today's Health Journal section of the Wall Street Journal on surprising risks to men's fertility. This is in additon to the article posted here yesterday on BPA in plastics causing a potential risk.

All these environmental risks may explain why we are seeing so many otherwise healthy men with morphology issues in their sperm.

Omega-3 fatty acids help DNA fragmentation in sperm

Saturday, April 9th, 2011

This is one of a series of news items from abstracts of studies presented at the Annual Meeting of the American Society for Reproductive Medicine as complied by Dr. David Meldrum, Scientific Director of Reproductive Partners. We appreciate the enormous amount of work it takes to compile and comment on these abstracts.


  A poster presentation showed that omega-3 fatty acids are beneficial in improving DNA fragmentation in sperm.

Forty-six men were randomized to 1050 mg of DHA or placebo. DHA is one of the two main omega-3s and is found in high concentration in sperm membranes.

 

DNA fragmentation by TUNEL decreased progressively over time from 26 to 9.  This dose of DHA would be equivalent to 3,000 mg of omega-3 fatty acids in fish oil containing both DHA and EPA. It is surprising that such a favorable effect was seen without a concomitant increase in antioxidants, as these highly unsaturated fats are very sensitive to oxidation and semen of infertile males has increased reactive oxygen species.

 

We have recommended a dose of 500-1,000 mg per day. Doubling that dose could be considered in men with a high percentage of fragmented sperm.

More ways to improve sperm with a healthy diet

Friday, December 10th, 2010

This is one of a series of news items from abstracts of studies presented at the Annual Meeting of the American Society for Reproductive Medicine as complied by Dr. David Meldrum, Scientific Director of Reproductive Partners. We appreciate the enormous amount of work it takes to compile and comment on these abstracts.


  In one study, fat intake was examined in infertile men. Men in the highest third of saturated fat intake and monounsaturated fat intake had significantly fewer sperm than men in the lowest third. Higher intake of polyunsaturated fats was associated with greater sperm motility, and higher intake of omega-3 fatty acids was associated with more favorable sperm morphology.

 The study reports further evidence that a healthy diet is associated with better sperm numbers and function, with the exception that monounsaturated fats, which are favorable for cardiovascular health, should be replaced by polyunsaturated fats for male infertility. Fish oil supplements should be considered for men with low sperm morphology. Antioxidants and polyunsaturated fats should be stressed for sperm motility. In all infertile men, low saturated fat intake may help to increase sperm density.  

 

 For more information see our Lifestyle pages where you can link to Dr. Meldrum's website for detailed information.

 

 

 

 

How long to abstain before an IUI?

Saturday, May 22nd, 2010

Traditionally a two day period of abstinence has been recommended prior to ovulation or an IUI. A recent study in the March 2010 issue of Fertility & Sterility suggests that shorter period of absintence results in better pregnancy rates. In this study an ejaculatory abstinence period of less than 2 days before IUI produced the highest pregnancy rates per cycle compared with longer intervals of ejaculatory abstinence. This higher conception rate occurred despite a lower total number of motile spermatozoa inseminated.

This may be explained by the observation that shorter periods of abstinence can result is less fragmentation in the DNA of the sperm. This is another demonstration of the fact the quality can be more important than quantity. It's important that those trying to conceive consult their doctors to determine the best period of abstinence in their case.

Your sperm are what you eat

Tuesday, April 20th, 2010

There's more evidence that a man's diet can not only affect his potency, but the quality of his sperm as well. In a study reported in Science Daily a  little-known omega-3 may have implications for treating male infertility. In a study done in mice that lacked the gene responsible for an enzyme important in making the omega-3, docosahexaenoic acid (DHA), male mice are basically infertile, But, when DHA was introduced into the diet, fertility was completely restored.

This is the first time that the importance of DHA to male fertility has been shown this directly, although some studies have suggested that male fertility patients with low sperm counts and less motile sperm tend to have low levels of this fatty acid.

The message here that may apply to humans is to make sure your intake of Omega-3 fatty acids is adequate. For more information and references see the Lifestyle and Fertility pages on our website.

Diet matters in making sperm

Tuesday, April 6th, 2010

We have all had the experience of being told that we need to eat a good, balanced diet. Turns out that's true, at least in order to produce normal sperm.

A study in the March 2010 issue of Fertility & Sterility examined the diets of 30 men with poor semen quality and 31 normospermic control subjects of couples attending a fertility clinic. They recorded dietary habits and nutrient consumption using a food frequency questionnaire. They found that control subjects had a significantly higher intake of carbohydrates, fiber, folate, vitamin C, and lycopene and lower intakes of proteins and total fat. Based on that they concluded that a low intake of antioxidant nutrients was associated with a poor semen quality.

RPMG's Dr. David Meldrum has a lot of information on the role of diet in male reproductive health on his website, Life Choices and Fertility.

Psychological stress may affect sperm parameters

Saturday, April 3rd, 2010

One of the most frequent questions I am asked by both men and women is whether stress may be affecting their fertility. There is a lot of evidence that stress can adversly affect a woman's fertility.There are studies showing that interventions with acupuncture and Mind-Body programs can have a positive influence on the chance of IVF success.

Now a multi-center study in the March 2010 issue of the journal Fertility & Sterility shows that more than two recent stressful life events decreased sperm parameters. In order to decrease the affect of variables that they may have found in infertile men, they examined the sperm of 744 fertile males. They found that men reporting more than two recent stressful life events had an increased risk of being classified below standard thresholds for “normal” defined by concentration, motility and morphology criteria, compared with men reporting less than two stressful life events.

The authors conclude that stressful life events may be associated with decreased semen quality in fertile men. Based on these findings the experience of psychosocial stress may be a modifiable factor in the development of male infertility.