Sperm quality factors

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Abnormal Sperm Production

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Healthy sperm: Improving your fertility - Mayo Clinic

There is no scientific evidence that wearing tight clothes or bike shorts affects the quality of your sperm. Diet, vitamins and supplements actually have very little impact on your sperm count - but they do help you stay healthy. Sports injuries to the groin will only have an impact on sperm production in extremely severe cases. While the effect of age on a man's fertility is not as significant as it is with women, there is a decline in the quality of sperm after the age of After this age, sperm volume, motility and morphology declines and damage to sperm DNA increases.
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Environmental factors and semen quality.

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An abnormal sperm count may also indicate an underlying health condition. A normal sperm count ranges from 15 million sperm to more than million sperm per milliliter mL of semen. Anything less than 15 million sperm per milliliter, or 39 million sperm per ejaculate, is considered low. A low sperm count is often referred to as oligospermia. A high, or above average, sperm count is over million sperm per millimeter.
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