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Sperm Midpiece Immunoglobulin Content (Screening)

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

This test measures the presence of certain antibodies in the sperm’s midpiece region, which may indicate an immune response affecting fertility.

Quick summary

["Assesses potential immune-related issues that could impact sperm quality and fertility."]

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

Key facts at a glance

LOINC
38675-5
Short code
Sperm Midpiece IgA NFr Spec IBT
Synonyms
Sperm Midpiece IgA NFr Spec 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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you or a partner have unexplained infertility, recurrent pregnancy loss, or symptoms suggesting an immune-mediated issue affecting sperm function. It helps identify whether antibodies are interfering with sperm viability or motility.

What to Expect Before the Test

No special preparation is needed. You’ll provide a semen sample (collected via masturbation or medical device) for analysis. The sample is typically processed to isolate the sperm midpiece, where antibodies may be detected.

What the Results Mean

Results are qualitative (positive/negative) rather than numeric. A positive test suggests the presence of antibodies in the midpiece, which may warrant further evaluation (e.g., confirmatory testing or immune workup).

Next Steps After Testing

If positive, your provider may recommend additional tests (e.g., sperm antibody titers, immune system checks) or treatments (e.g., immunosuppression) to address potential fertility barriers.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Autoantibodies in the sperm midpiece can disrupt sperm function by coating proteins essential for motility or fertilization. While not all positive results indicate infertility, they may point to an underlying immune disorder that requires targeted investigation.

Short name

Sperm Midpiece Immunoglobulin Test

Frequently asked questions

Will this test show if I have low sperm count?
No. This test specifically looks for antibodies in the sperm midpiece, not overall sperm quantity or quality. A low sperm count would be evaluated with separate semen analysis tests.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Follow-up with your provider for interpretation.
Can I take anything to prepare for this test?
No medications or lifestyle changes are required. Avoid ejaculation for 2–3 days before testing if instructed by your provider, but this is not standard for this specific test.
  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