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Sperm Motility Analysis by Computer-Assisted Semen Analysis (CASA)

Published: August 9, 2026Updated: August 16, 2026

This test evaluates the movement patterns of sperm cells in your semen sample to assess fertility and potential issues with sperm function.

Quick summary

["Understanding sperm motility helps determine if sperm are moving effectively to support conception."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
10618-7
Short code
Sperm Motile w IgM NFr Smn IBT
Synonyms
Sperm Motile w IgM NFr Smn IBT
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
immunobead
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

Sperm motility analysis typically looks at key metrics such as the percentage of motile sperm (sperm that move actively), their speed, and their directionality. Advanced systems may also measure straight-line velocity, curvilinear velocity, and amplitude of lateral head displacement.

Why It Matters for Fertility

Proper sperm motility is essential for sperm to swim through the cervix, reach the egg, and fertilize it. Abnormal motility can indicate underlying health issues, such as genetic disorders, hormonal imbalances, or exposure to toxins.

Sample Collection and Preparation

You’ll provide a semen sample, usually collected through masturbation in a sterile container. The sample is then analyzed using a specialized microscope or automated system to count and evaluate sperm movement patterns.

Common Findings and Their Implications

Results may categorize sperm motility as normal, suboptimal, or abnormal. For example, low motility or irregular movement patterns might suggest conditions like varicocele, retrograde ejaculation, or genetic factors affecting sperm health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Sperm Motility Test

Frequently asked questions

Does this test require fasting?
No, fasting is not required for this test. You’ll need to abstain from ejaculation for about 2–5 days before collecting the sample to ensure a representative semen analysis.
How long does it take to get results?
Results are typically available within 1–3 business days after the sample is processed. Your healthcare provider will discuss findings with you during a follow-up visit.
Can lifestyle changes improve sperm motility?
Yes, certain lifestyle changes—such as maintaining a healthy weight, avoiding smoking and excessive alcohol, managing stress, and ensuring adequate hydration—may support sperm health and motility.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy