Being too fat can damage sperm
- added July 10, 2008
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- JanaPokana
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Obese men have poorer quality sperm, perhaps because too much fat around their testicles causes them to heat up, scientists have suggested.
University of Aberdeen researchers looked at the sperm of over 2,000 men in couples having problems conceiving. The heaviest men had a higher proportion of abnormal sperm, as well as other problems.
The men were divided into four groups, according to their BMI (body mass index). Other factors which could affect fertility, such as smoking, high alcohol use and age, were taken into account by the researchers. Men who had a healthy BMI of 20 to 25 were had higher levels of normal sperm than those who were heavier. They also had higher semen volume, the European Society for Human Reproduction and Embryology meeting in Barcelona was told. But those with a higher BMI had lower volumes of seminal fluid, and a higher proportion of abnormal sperm. There was no significant difference between the four groups in sperm concentration or activity.
Dr Ghiyath Shayeb, who led the research, said: "Our findings were quite independent of any other factors and seem to suggest that men who are trying for a baby with their partners, should first try to achieve an ideal body weight.
Dr Shayeb said there were a number of possible explanations, including different hormone levels in obese men, overheating of the testicles caused by excessive fat in the area, or simply the lifestyle and diet that leads to obesity also causing poorer semen quality.
University of Aberdeen researchers looked at the sperm of over 2,000 men in couples having problems conceiving. The heaviest men had a higher proportion of abnormal sperm, as well as other problems.
The men were divided into four groups, according to their BMI (body mass index). Other factors which could affect fertility, such as smoking, high alcohol use and age, were taken into account by the researchers. Men who had a healthy BMI of 20 to 25 were had higher levels of normal sperm than those who were heavier. They also had higher semen volume, the European Society for Human Reproduction and Embryology meeting in Barcelona was told. But those with a higher BMI had lower volumes of seminal fluid, and a higher proportion of abnormal sperm. There was no significant difference between the four groups in sperm concentration or activity.
Dr Ghiyath Shayeb, who led the research, said: "Our findings were quite independent of any other factors and seem to suggest that men who are trying for a baby with their partners, should first try to achieve an ideal body weight.
Dr Shayeb said there were a number of possible explanations, including different hormone levels in obese men, overheating of the testicles caused by excessive fat in the area, or simply the lifestyle and diet that leads to obesity also causing poorer semen quality.
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- JanaPokana
- 2 months ago
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