Fertility Glossary

Sperm concentration

The number of sperm per millilitre of semen.

Concentration is one of several measures reported against the current WHO reference values. A single below-range result should be repeated before conclusions are drawn.

Related terms

Semen analysis

A laboratory test of sperm number, movement and shape.

Total sperm count

The total number of sperm in the whole sample.

Oligozoospermia

A low sperm count.

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