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Sperm Agglutination Test (Microagglutination)

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

This test checks for antibodies that may cause sperm cells to clump together, which could affect fertility.

Quick summary

["A simple blood test to evaluate potential sperm-related fertility issues by detecting clumping antibodies."]

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

Key facts at a glance

LOINC
101624-5
Short code
Sperm Agglutinated p ejac Ur Ql Micro
Synonyms
Sperm Agglutinated p ejac Ur Ql Micro
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
microscopy-light
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
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 fertility problems, recurrent miscarriages, or if other tests suggest an immune-related cause for infertility. It helps identify whether antibodies in your blood are interfering with sperm function.

During the test, a small amount of your blood is mixed with sperm cells. If antibodies are present, the sperm will clump together (agglutinate) under a microscope. This reaction is detected and recorded.

The test is qualitative, meaning it provides a yes/no result rather than a specific measurement of antibody levels.

What to Expect Before the Test

No special preparation is needed. You may have a simple blood draw, similar to other routine blood tests. If this is part of a fertility evaluation, your provider may also discuss additional steps, such as timing around the menstrual cycle.

A positive result (sperm clumping) suggests the presence of antibodies that could potentially affect fertility. A negative result means no clumping was observed, but this does not rule out other fertility causes.

A positive result may prompt further testing or evaluation, such as additional antibody screening or sperm analysis, to explore underlying causes. Always discuss results with your healthcare provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Sperm Agglutination Test

Frequently asked questions

What causes sperm agglutination?
Sperm agglutination can occur due to autoimmune reactions, where the body produces antibodies against sperm. This may be triggered by infections, hormonal imbalances, or other immune system dysfunctions. It is not always clear why some individuals develop these antibodies, but it is often part of a broader evaluation for unexplained infertility.
How is this test different from other fertility tests?
This test specifically looks for antibodies that cause sperm to clump together. Unlike other fertility tests (such as sperm count or motility tests), it does not measure sperm quantity or function directly but rather checks for immune-mediated interference. It is often used alongside other tests to identify potential immune-related causes of infertility.
Can lifestyle changes affect sperm agglutination test results?
While the test itself is not affected by lifestyle changes, certain habits—like smoking, excessive alcohol consumption, or exposure to toxins—may influence overall fertility and could indirectly affect the underlying causes of sperm agglutination. Always follow your healthcare provider’s advice regarding lifestyle modifications if recommended.
  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