Oligospermia - Definition

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Definition


Oligospermia is the term used to describe an abnormally low concentration of spermatozoon in a man's semen (sperm), which can lead to fertility problems. It is defined as a numerical value inferior to 20 million spermatozoon per millimeter of semen. It differs from azoospermia where there is a total absence of both spermatozoon and asthenozoospermia in the semen, the latter denoting reduced mobility spermatozoon. This condition is discovered during a sperm analysis, called a seminogram, typically conducted in cases of couple infertility. There are very diverse underlying causes. It can be due to, for example, a genetic condition, hormonal deficiency, abnormal position of one or both testicles such as is seen in cryptorchidism, the result of a genital infection, or the affect of medication, and so on. When difficulties arrive in conceiving due to this lack of spermatozoon, it is possible to call upon assisted reproductive technology (ART).

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