Allo-FBGG Test Negative
What the result means
A "Negative" Allo-FBGG result means that your baby does not have the blood group antigen that your antibody reacts to and that your baby is not at risk for hemolytic disease of the fetus and newborn (HDFN).
Next steps
No extra monitoring is needed, and you can continue with routine prenatal care.
Note: If you have anti-K antibodies, a repeat Allo-FBGG test will be done at 28 weeks of pregnancy to confirm the initial negative K-antigen result.
At delivery
A small blood sample will be collected from the umbilical cord to confirm your baby’s antigen status. The results may be used to guide newborn care and may be shared with the testing laboratory for quality checks.
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Virtual educational sessions on prenatal screening and nuchal translucency quality assurance are available upon request for health‑care providers.