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WHO 2021 values

Normal semen analysis values (WHO 2021)
Six numbers, and one rule.

Short answer

By the WHO 2021 reference, a semen analysis is within range with volume ≥ 1.4 mL, concentration ≥ 16 million/mL, total count ≥ 39 million per ejaculation, progressive motility ≥ 30%, normal morphology ≥ 4% and vitality ≥ 54%. A result below the reference is not a verdict: the clinical standard is to repeat the test in 4 to 12 weeks.

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The reference table

WHO reference values, 2021 edition

ParameterReference valueWhat it indicates
Volume≥ 1.4 mLProstate, seminal vesicles
Concentration≥ 16 million/mLTotal amount
Total sperm count≥ 39 million/ejaculationAbsolute total
Progressive motility≥ 30%Ability to reach the egg
Normal morphology≥ 4%Proper shape
Vitality≥ 54%How many are alive

Source: WHO laboratory manual for the examination and processing of human semen, 6th ed., 2021.

Each value is a minimum: the result is within the reference when it is at or above that number. The values are quite specific, so it's worth knowing them before the report arrives.

Look at every line, not only concentration. A sample can have plenty of sperm and still fall short on progressive motility, the ability to reach the egg, or on normal morphology, the proper shape. Each row answers a different question.

Below the reference

The names you may see on the report

When a parameter falls short, the report or the doctor may use one of these terms:

  • Oligospermia: low sperm concentration
  • Asthenospermia: low motility
  • Teratospermia: a high proportion of abnormally shaped sperm
  • Azoospermia: no sperm in the ejaculate

Each of these names describes what was found in one sample. Because sperm production varies month to month, what you do next matters more than the name.

Not a verdict

An abnormal result is a starting point

An abnormal semen analysis is not a verdict

If the result comes back below the reference, do NOT assume "male infertility". Sperm production varies month to month. The clinical standard is to repeat the test in 4 to 12 weeks before drawing conclusions and, in parallel, to implement habit changes.

  1. Don't draw conclusions from a single result.
  2. Repeat the semen analysis in 4 to 12 weeks, prepared the same way (3 to 5 days of abstinence).
  3. Start the habit changes at the same time, without waiting for the second result.
  4. If the result is abnormal again on the second evaluation, see a urologist, ideally one who specializes in reproduction.

Many men with a bad first test come back normal after 3 to 6 months of adjustments. Unlike eggs, which are finite, sperm is produced continuously, and habit changes show a measurable effect in 90 days. Fever in the 2 weeks before collection and some recent antibiotics also affect the parameters, one more reason not to judge by a single sample.

Where this fits

This is one chapter. The map has 42.

These values come from Chapter 25 of Map to the Positive, "His fertility: what he needs to do", in Station III (Optimization). Beyond the table, the chapter gives the 10 habits that change sperm quality, how to prepare for the collection and the full list of signs that call for a urologist. The book treats his side as half the equation, not an afterthought.

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References: WHO laboratory manual for the examination and processing of human semen, 6th ed., 2021.

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