Decreased number of spermatozoa in the semen.
Comprehensive, easy-to-understand information about this condition
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infertility due to extratesticular cause
MONDO:0001877
spermatogenic failure
MONDO:0004983
partial chromosome Y deletion
MONDO:0015607
male infertility with teratozoospermia due to single gene mutation
MONDO:0018394
male infertility due to acephalic spermatozoa
MONDO:0035153
azoospermia
MONDO:0100459