There is so much information on the negative impact of being overweight today that it was only a matter of time before this research was done. Gentlemen, watch the diet,you are not immune to the effects of too many wings and frappacinos...its bad enough that your heart is stressed and your pants dont fit...now the swimmers are suffering.
Obese Men Produce Less Semen, More Abnormal Sperm (Update1)
By Frances Schwartzkopff
July 10 (Bloomberg) -- Obese men produce less semen and fewer healthy sperm and should considering losing weight if they want to have children, U.K. researchers said.
A. Ghiyath Shayeb and colleagues at the U.K.'s Aberdeen Fertility Center compared the health records of 2,037 men and found that those of normal weight had higher levels of normal sperm and more semen. Shayeb reported the findings at the annual conference of the European Society of Human Reproduction and Embryology in Barcelona this week.
``We felt that it was possible that male overweight might contribute to fertility problems, particularly since it is a known risk factor for problems in conceiving among women,'' Shayeb said in a statement. The findings ``suggest that men who are trying for a baby with their partners should first try to achieve an ideal body weight,'' he said.
Different levels of hormones in obese men, overheating of the testicles because of fat, and diet all may contribute to lower sperm quality, researchers said. To what extent obesity and poor semen quality lead to lower fertility needs further study, Shayeb said. Other research suggests obese men produce more abnormal sperm in which the DNA, the instructions for cell growth and function, are damaged, leading to infertility and more miscarriages.
Male infertility problems may be responsible for up to half of couples' inability to conceive, the U.S. National Institutes of Health estimates.
Semen Analysis
Semen analysis measures the volume of semen, the number and structure of sperm and their ability to move. Shayeb conducted semen analysis on 5,316 men attending the fertility clinic and had complete body-mass index ratings for 2,037.
BMI reflects a person's weight compared with height. Men in the study with healthiest sperm had an optimal BMI of between 20 and 25. A person with a BMI between 25 and 30 is considered overweight and those with higher levels are obese.
The number of obese people worldwide will probably increase 75 percent from an estimated 400 million in 2005 to 700 million in 2015, largely because of fattier foods and less physical activity, the World Health Organization estimates.
Diabetes also appears to be a cause of poor DNA quality, according to another study presented at the Barcelona meeting. Researchers led by Con Mallidis of Belfast's Queens University found the amount of damaged DNA in diabetics' sperm was higher than in men with normal blood sugar levels.
To contact the reporter on this story: Frances Schwartzkopff in Copenhagen at fschwartzkop@bloomberg.net
Last Updated: July 10, 2008 10:32
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9 comments:
Overweight still serious problem in our life.
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