Understanding Lab Tests for Congenital CMV
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Congenital cytomegalovirus (CMV) is a viral infection that occurs when a pregnant mother transmits the CMV virus to her developing fetus. While there is no single blood test to diagnose congenital CMV in the fetus itself, maternal blood testing is fundamental for assessing the risk of transmission and monitoring CMV status during pregnancy.
Recommended Test
Cytomegalovirus (CMV) Antibodies, IgG
This test measures IgG antibodies against CMV in the mother's blood. High levels of CMV IgG antibodies may indicate a risk for congenital CMV transmission to the fetus, particularly when associated with a primary CMV infection during pregnancy. This testing helps healthcare providers assess maternal CMV status and implement appropriate monitoring strategies.
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Why Blood Testing is Important for Congenital CMV Risk
CMV is a common virus that can cause serious complications when transmitted from mother to baby during pregnancy. Blood tests that measure CMV antibodies in the mother are essential for determining infection status, assessing risk factors, and guiding appropriate prenatal care and monitoring strategies.
Understanding CMV Antibody Testing
CMV IgG antibodies indicate past or current exposure to the cytomegalovirus. When evaluated alongside other factors and clinical assessment, this testing provides valuable information about the risk of viral transmission to the developing baby and helps guide prenatal care decisions.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
