Oligozoospermia is the presence of an abnormally low number of sperm in a semen sample.
According to the criteria in the 5th edition of the World Health Organisation (WHO) manual, normal sperm content in a sample of semen should be equal to or above 15 million per millimetre. If a sperm count gives a result below this figure, this is known as oligozoospermia and it may be associated with fertility issues. More than one sample will need to be evaluated in order to confirm this.
The diagnosis method consists of a spermogram which, amongst other things, gives a sperm count per millimetre of semen. […]