Rubella IgG Avidity Test
- Category
- Pregnancy
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 5 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
A blood test that measures the avidity (binding strength) of IgG antibodies against rubella virus.
Why this test is performed?
Helps diagnose rubella (German measles), which can cause birth defects if caught in pregnancy. Low avidity suggests the infection happened in the last few months, while high avidity suggests an older infection — very important in pregnancy to time the infection.
Who should take this test?
Women planning pregnancy or who are pregnant, as advised by the gynaecologist.
Test Preparation
No fasting needed.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
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Frequently asked questions
Certain infections in pregnancy can harm the baby. Knowing your immunity status helps your doctor plan care and, where available, vaccination before pregnancy.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 3–4 days after the sample reaches the lab. You will receive the report online.
This test is meant for women only.
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