74-day sperm timeline: when a change shows in a semen analysis
Pick a start date and see the four phases of the 74-day sperm cycle with dates, which day you're on, and when a change you make will show in a semen analysis.
Updated
Semen analysis checker: compare your results with the WHO 2021 limits
Enter your semen analysis values and see each against the WHO 2021 lower reference limit, with total count calculated. Runs in your browser; nothing is sent.
Updated
Total motile sperm count calculator (TMSC)
Work out your total motile sperm count from a semen analysis, and see what the research groups and IUI thresholds mean. Runs in your browser.
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Read the guides behind the tools
How to read semen analysis results
Every number on the report, what the WHO lower reference limit means, and why one test is not a verdict.
How long it takes to improve sperm
The production cycle, the epididymal transit, and when a retest can show a change.
Motily is a lifestyle and wellbeing tool, not a medical device. These pages summarise published research and never diagnose. If a semen analysis is below the reference limits, or you have been trying for a year (six months if your partner is 35 or over), see a GP or a urologist.
