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Test: Semen Analysis

Microscopic examination of several samples of a man’s semen is carried out to investigate male infertility. If there are too few sperm or if many are deformed or unable to swim properly, fertility will be reduced. An abnormally small volume of semen may also indicate a fertility problem.

The sperm count

A sperm count is usually considered normal if there are over 20 million sperm per millilitre of semen with over 50 per cent able to swim effectively and over 30 per cent of normal shape.

From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.

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