RBC Antibody Screen
Screens for red blood cell antibodies, commonly ordered during pregnancy.
About this test
This test looks for antibodies that may react with red blood cells, which can matter during pregnancy or transfusion planning.
Common reasons for testing
- Routine prenatal assessment and follow-up when indicated.
- Evaluation of a known red-cell antibody.
These are examples of clinical uses. Your history and symptoms determine whether testing is appropriate.
What to expect
A small blood sample is taken from a vein in your arm. You may feel a brief pinch and have mild bruising. Tell the person collecting your sample if you have fainted with needles or take a blood thinner; keep pressure on the site afterward.
Appointment length
Your visit is expected to take about 15 minutes at our West Ashley location.
Categories
Preparation
- Tell the clinician about prior transfusions, pregnancies, known antibodies, and recent Rh immune globulin (RhoGAM) injections.
- Fasting is not usually needed for this test alone. If other tests are being collected, confirm their instructions before your visit.
- Bring a list of medicines and supplements, including biotin, vitamins, and hormones. Do not stop or change prescribed medicines unless your clinician tells you to.
Order requirement
No outside order needed
Understanding your results
- A positive screen needs identification of the antibody and an individualized plan.
What happens next?
Review the report with your clinician alongside your symptoms, medical history, and earlier results. A value outside the reference range does not always mean disease, and a normal result does not explain every symptom. Confirm who will arrange any repeat or additional testing.
Sources & further reading
This patient summary draws on published clinical literature and professional guidance. Patient resources are identified separately below. Preparation also depends on your specific order and the collecting laboratory or imaging team.
- Approach to red blood cell antibody testing during pregnancy
Canadian Family Physician, 2020
Content updated October 11, 2026. General education; individual advice comes from your care team.
Know the cost before your visit
Palmetto Preventive is a direct-pay service. You will see clear payment terms before your booking is finalized — no surprise lab bill.
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One transparent price for this test. Payment terms are presented before your booking is finalized.
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If testing is not approved, your payment is refunded in full.
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