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Sperm Immunoglobulin G (IgG) Antibody Screening (Plasma)

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

This test measures antibodies (specifically IgG) in your blood that may react against sperm, which could be relevant in fertility evaluations.

Quick summary

["This test helps assess potential immune-related infertility issues by detecting sperm-reactive antibodies in your bloodstream."]

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

Key facts at a glance

LOINC
38686-2
Short code
Sperm IgA+IgG NFr Spec IBT
Synonyms
Sperm IgA+IgG 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 are experiencing unexplained infertility, recurrent miscarriages, or if there’s a history of immune-related fertility challenges. It can also be part of a broader evaluation for unexplained infertility in both men and women.

What to Expect During the Test

After the blood is drawn, it will be sent to a lab for analysis. The lab will measure the concentration of IgG antibodies that may react with sperm. Results are typically available within 1–3 business days.

Understanding Your Results

A positive result means your blood contains antibodies that may interfere with sperm function or implantation. This doesn’t always mean infertility is caused by this alone, but it may warrant further investigation, such as sperm antibody testing or assisted reproductive technologies.

Next Steps and Considerations

A negative result suggests no detectable sperm-reactive IgG antibodies in your blood, but other fertility causes may still need evaluation. Follow-up testing or counseling may be advised if infertility remains unexplained.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgG Antibody to Sperm Test

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 1–3 business days, depending on lab processing times. Your healthcare provider will contact you once the results are ready.
Can I take anything special to prepare for this test?
No special preparation is needed. You can eat, drink, or take medications as usual on the day of your blood draw. Avoid alcohol for 24 hours before testing if possible, as it may affect antibody levels.
Will this test be covered by insurance?
Coverage depends on your insurance plan and the clinical indication for the test. If ordered as part of a fertility evaluation, check with your insurer to confirm coverage details. Some plans may require prior authorization for fertility-related tests.
  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