Overweight and obese men in a new study showed diminished quantity and quality of semen, suggesting that a weight problem might also affect fertility, researchers say.
"The heavier the men, the higher the chances of a low sperm count," urologist Dr. Keith Jarvi told Reuters Health. "I don't think that this message is well known or appreciated by men in general," said Jarvi, who was not involved in the new study.
Dr. Michael Eisenberg, of Stanford University School of Medicine in California, and his colleagues recruited 468 couples in Texas and Michigan who were planning to conceive a child and tested several aspects of the men's semen.
They also weighed the men and measured their waists and found that greater waist circumference and body mass index (BMI) - a measure of weight relative to height - were both linked to lower ejaculate volume.
"All aspects of semen quality are important," Eisenberg said. "Ejaculate has several chemicals that provide a safer environment for sperm. As such, if the volume is low it may be a problem." http://www.nlm.nih.gov/medlineplus/news/fullstory_143621.html
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