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Interpretation
Enter values and select a method to see the interpretation here.
Reference thresholds
| Category | Normal forms (%) | Notes |
|---|---|---|
| Normal | ≥ 4.0 | Common lower reference limit in strict scoring. |
| Borderline | 2.0 – 3.9 | Repeat testing; evaluate full semen profile. |
| Low | < 2.0 | Discuss with clinician; consider causes and context. |
FAQs
It measures the percentage of sperm with typical head, midpiece, and tail shape using defined criteria. Results reflect observed shape, not genetics or DNA integrity.
Many labs use ≥4% normal forms as the lower reference limit with strict scoring. Always check your report’s own reference intervals and comments.
Not necessarily. Morphology is one component of a full semen profile. Fertility depends on many factors including concentration, motility, reproductive tract health, and partner factors.
It can change. Addressing lifestyle, febrile illness recovery, cessation of gonadotoxins, and time since exposures may help. Medical evaluation identifies reversible causes where possible.
Kruger strict (Tygerberg) uses very stringent shape criteria. WHO manuals describe morphology assessment and often align with strict scoring in modern practice. Labs may report either system.
Recheck after 10–12 weeks to span one full spermatogenic cycle or sooner if advised by your clinician. Repeat testing helps confirm persistent patterns.
Morphology alone is an imperfect predictor. Decisions for IUI or IVF consider the whole clinical picture, including total motile count, female partner factors, and prior outcomes.
Disclaimer: This tool is for education. It cannot diagnose or replace care from a qualified professional. Always consult your clinician about test results and treatment.