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Sperm Motility Analysis by Computer-Assisted Sperm Parameter Evaluation (CASP)

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

This test evaluates the movement and health of sperm cells to help assess fertility and potential issues with conception.

Quick summary

["Assesses sperm function that may affect pregnancy success."]

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

Key facts at a glance

LOINC
38562-5
Short code
Sperm.tail w IgM NFr Smn IBT
Synonyms
Sperm.tail 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

This test analyzes sperm motility using advanced technology to measure characteristics like speed, direction, and consistency of movement. It helps determine whether sperm are capable of swimming effectively, which is crucial for fertilization.

How the Test Works

A small sample of semen is collected and examined under a microscope with specialized software. The system tracks individual sperm cells to generate a detailed report on their movement patterns and overall motility.

Why It Matters for Fertility

Sperm motility is a key factor in male fertility. Poor motility can indicate underlying health issues, such as hormonal imbalances, genetic factors, or exposure to toxins. This test helps identify these problems so they can be addressed.

Common Reasons for Testing

Doctors may recommend this test if a couple has struggled with infertility, if male factors are suspected in fertility issues, or if recurrent pregnancy loss occurs. It’s also part of pre-sperm donation evaluations.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Sperm motility test

Frequently asked questions

What questions might you have about this test?
This test does not provide a single ‘pass/fail’ result but instead gives a detailed profile of sperm movement. Results are used alongside other fertility assessments to guide treatment options.
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 the findings with you during a follow-up visit.
Is there any preparation needed before the test?
No special preparation is required. You may have sex 2–5 days before the test to collect a semen sample, but abstinence for too long can affect results.
  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