How old do you have to be to get sperm?

It happens around the age of Puberty, and that varies from guy to guy. Maybe around 12 to 14 with a lot of variability?
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When you started writing Marked, did you anticipate it would be the first in a 12 book series?

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Do old men sperm carry worms?

No, old men do not have worms in their sperm. Sperm will be healthy  even when a person is not.
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Do fifty four year old men produce viable sperm?

Yes, they do. Some men remain fertile well in their golden years, it always depends on the health of the individual. Usually with men over 60 things start to go downhill. Men (MORE)

Should a 12 year old boy have sperm?

He could. We all develop at a different rate, some 10 year old could be producing sperm and some 14 y ear old don't. It is probably more likely that a 12 year old would be pro (MORE)
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How old do you start having sperm?

Sperm production begins with the onset of puberty in males and is a constant process that takes 70 days from start to finish (unlike eggs in females). Puberty usually begins b (MORE)
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What would cause low sperm count in 4 year old male beagle dog?

Pesticides from yards, farms, and even in flea protection could lower his sperm count. Stress from waiting for you to get home, waiting to go outside, waiting to get ouf of a (MORE)