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RHD Antibody, Qualitative (Serum/Plasma)

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

This test detects the presence of antibodies against the RhD antigen, which can help determine compatibility for blood transfusions or pregnancy-related risks.

Quick summary

["Checks for RhD antibodies to prevent transfusion reactions or complications in pregnancy."]

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

Key facts at a glance

LOINC
23580-4
Short code
RHDV Ag Tiss Ql IA
Synonyms
RHDV Ag Tiss Ql IA
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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 Matters in Blood Transfusions

The RhD antigen is a protein found on red blood cells. If you have RhD antibodies, your immune system may attack donated blood that lacks this antigen, potentially causing severe reactions. This test ensures safe blood transfusions by confirming whether you have these antibodies.

Role in Pregnancy and Fetal Health

If you are pregnant or planning pregnancy, this test helps identify whether you’ve developed RhD antibodies, which could affect your baby’s blood type. It’s crucial for planning safe delivery methods or potential treatments.

How the Test Works

Your blood sample is tested using an immunoassay method to detect RhD antibodies. If antibodies are present, the test will indicate a positive result. This method is quick and reliable for screening.

Sample Collection and Preparation

A small blood sample is drawn from your arm, typically in a lab setting. The sample is processed into either serum or plasma for testing. No special preparation is needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Preventing Complications

Short name

RHD Antibody (Qualitative)

Frequently asked questions

If you have RhD antibodies, your doctor may recommend additional monitoring during pregnancy, such as fetal blood testing or immune globulin treatments to protect your baby from Rh incompatibility-related risks.
Yes, this test is essential for patients with a history of blood transfusions, pregnancy complications, or those who have received RhD-negative blood. It helps prevent severe reactions like hemolytic anemia or fetal distress.
No, this test does not measure RhD antigen levels directly but confirms whether your immune system has produced antibodies against it. Results are qualitative (positive or negative).
If your test is positive, your doctor will discuss next steps, such as avoiding RhD-negative blood transfusions or planning specialized prenatal care. Follow-up testing may be recommended.
Common side effects from blood drawing include mild bruising, soreness, or a small amount of bleeding at the site. Most people experience no lasting effects from this simple test.
This test is typically performed as part of routine blood screening, especially for pregnant women or those who may require transfusions. Results are usually available within a few hours to a day.
  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