Semen analysis

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Sperm Semen analysis

Overview Risks Results

Semen analysis

The semen is analyzed for the volume; number and structure of the sperm; sperm movement; and the fluid thickness, acidity, and sugar content.

Values may vary from laboratory to laboratory. The most common normal values are listed below.

The normal volume varies from 1.5 to 5.0 milliliter per ejaculation. The sperm count varies from 20 to 150 million sperm per milliliter. At least 60% of the sperm should have a normal shape and show normal forward movement (motility).

If the sperm count is very low or very high there is a likelihood of being less fertile. The percent of normal sperm has an effect on infertility. The acidity of the semen and the presence of white blood cells (suggesting infection) may influence fertility. The use of many recreational and prescription drugs, alcohol, and tobacco use may affect fertility.

Additional conditions under which the test may be performed:

• Klinefelter's syndrome

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