1.17.1
Compare the results of semen analysis conducted as part of an initial assessment with the following World Health Organization (WHO) reference values (see the WHO laboratory manual for the examination and processing of human semen):
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semen volume: 1.4 ml or more (95% confidence interval [CI] 1.3 to 1.5)
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pH: 7.2 or more
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sperm concentration: 16 million spermatozoa per ml or more (95% CI 15 to 18)
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total sperm number: 39 million spermatozoa per ejaculate or more (95% CI 35 to 40)
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total motility (percentage of progressive motility and non-progressive motility): 42% or more motile (95% CI 40 to 43)
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progressive motility: 30% or more (95% CI 29 to 31)
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vitality: 54% or more live spermatozoa (95% CI 50 to 56)
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sperm morphology (percentage of normal forms): 4% or more (95% CI 3.9 to 4.0). [2004, amended 2026]
Note that the reference ranges are only valid for the semen analysis tests outlined by the World Health Organization.