Death of sperm cells: Sperm is created from a very early sperm forming cell. All sperm comes from the duplication and then splitting of these early sperm cells. They then grow for the next 90 days to become what is ejaculated. Chemotherapy kills these early cells which then prevents any further sperm to be made. By killing the early progenitor cells it prevents the growth of mature sperm.
Answered 7/2/2014
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