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Definition of Azoospermia

Azoospermia: No sperm at all. The ejaculate is completely devoid of sperm.

By contrast, in oligospermia (literally, few sperm) there are some sperm, but fewer than normal.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=15755
Last Editorial Review: 6/14/2012

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