Sperm Motility Evaluation at 2 Hours Post Ejaculation via Computer-Assisted Analysis (JASMA)
This test measures the movement ability of your sperm after ejaculation, evaluated 2 hours later using a specialized microscope and computer analysis.
["Assessing sperm motility is key to understanding fertility potential after ejaculation."]
Key facts at a glance
- LOINC
- 21532-7
- Short code
- Sperm Motile 2h p ejac NFr Smn
- Synonyms
- Sperm Motile 2h p ejac NFr Smn
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 20
- Ref high
- 400
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82670
- 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
Why This Test Is Done
Doctors may order this test if you’re experiencing difficulty getting pregnant, unexplained infertility, or if sperm motility was previously abnormal. It helps evaluate how well sperm can swim and move toward an egg, which is essential for fertilization.
What to Expect Before the Test
No special preparation is needed. You’ll provide a semen sample (ejaculate) in a sterile container, typically collected by masturbation in a clinic or at home with instructions. The sample is then analyzed within 2 hours of collection.
How the Test Works
A trained technician examines the semen sample under a microscope equipped with computer software. The software calculates the percentage of motile (moving) sperm and their movement characteristics, such as speed and direction.
What the Results Mean
Results are reported as a percentage of motile sperm and may include additional metrics like sperm velocity or straight-line velocity. While specific reference ranges vary by lab, lower than expected motility percentages may indicate fertility challenges.
Reference range
Premenopausal: 20-400 pg/mL; Postmenopausal: <30 pg/mLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Sperm motility is a critical factor in male fertility. Poor motility can reduce the chances of sperm reaching and fertilizing an egg. This test helps identify potential issues that may require further evaluation, such as hormonal imbalances, genetic factors, or lifestyle influences.
Frequently asked questions
How long does it take to get results from this test?
Can I perform this test at home?
What if my sperm motility is low?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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