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Obesity Linked to Lower Sperm Count in Young Men,  Aug 11, 2010
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Young men who are obese may have a lower sperm count than their normal-weight counterparts, a new study suggests.

The findings, reported in the journal Fertility and Sterility, add to evidence tying obesity to relatively poorer quality sperm.

A number of recent studies have found that compared with leaner men, obese men tend to have lower sperm counts, fewer rapidly mobile sperm and fewer progressively motile sperm, which refers to sperm that swim forward in a straight line rather than moving about aimlessly.

But age is a "confounding" factor in examining the relationship between obesity and sperm quality. Older men tend to have lower sperm quality than younger men, and they also tend to have more body fat.

However, among the more than 2,000 men in the current study, obese men between the ages of 20 and 30 generally had a lower sperm count than normal-weight men in the same age group.

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