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    Your sperm count, what the numbers mean, and when ICSI is genuinely the right call

    Reviewed by HHH Clinical Team · April 2026

    1 section · 2 min read

    Tests & Investigations
    2 minHHH clinical team
    WHAT DOES A SEMEN ANALYSIS ACTUALLY MEASURE?

    What does a semen analysis actually measure?

    A looks at three main numbers: count (how many sperm per millilitre), motility (what fraction are moving forward), and morphology (what fraction are normally shaped). The WHO reference ranges have changed over time, partly as the global average has shifted. A single low result is not a diagnosis. Repeat the test after 8 to 12 weeks, because sperm production runs on a 74-day cycle.

    The grey zone

    When is ICSI the right choice and when is it being oversold?

    Standard position · Global

    ICSI was developed for severe male-factor infertility, where conventional IVF would not work. It is appropriate when sperm count, motility, or morphology is severely abnormal, or when previous IVF cycles have shown failed fertilisation.

    Where it gets more nuanced

    What we honestly do not know

    We do not know with high confidence whether the global sperm count decline is reversing, plateauing, or continuing. We do not have great data on whether South Asian populations are following the same trajectory or a different one.

    Bottom line

    If the clinic is recommending ICSI and there is no male-factor reason in your results, ask them to walk you through why. If there is a male-factor reason, ICSI is well-evidenced. Either way, you are entitled to the answer.

    References

    1. [1] 36377604Levine H et al. Temporal trends in sperm count: a systematic review and meta-regression analysis of samples collected globally in the 20th and 21st centuries. Hum Reprod Update 2022;29(2):157-176.
    2. [2] pmid-icsi-vs-ivf-non-male-factor-2021Geng T et al. Routine use of ICSI for non-male factor infertility: a systematic review and meta-analysis. Reprod Biol Endocrinol 2021.
    3. [3] pmid-varicocele-repair-meta-2024Persad E et al. Surgical or radiological treatment for varicoceles in subfertile men. Cochrane Database Syst Rev 2024.

    Browse the full evidence library →

    For your doctor

    Patient requests semen analysis (or repeat if previous abnormal). Discussion of WHO reference ranges, repeat timing (8-12 weeks), and indications for ICSI vs conventional IVF in their specific scenario.

    I would like a semen analysis, please. If I have had one before, I would like to repeat it after the standard interval. I would also like to understand what my numbers actually mean, and whether they justify ICSI.

    How did this land with you?

    Read next

    References

    1. [1] 36377604Levine H et al. Temporal trends in sperm count: a systematic review and meta-regression analysis of samples collected globally in the 20th and 21st centuries. Hum Reprod Update 2022;29(2):157-176.
    2. [2] pmid-icsi-vs-ivf-non-male-factor-2021Geng T et al. Routine use of ICSI for non-male factor infertility: a systematic review and meta-analysis. Reprod Biol Endocrinol 2021.
    3. [3] pmid-varicocele-repair-meta-2024Persad E et al. Surgical or radiological treatment for varicoceles in subfertile men. Cochrane Database Syst Rev 2024.

    Browse the full evidence library →

    Reviewed by clinicians

    Authored and reviewed by clinicians from the founding team. Information only, not personalised medical advice.