Allo-FBGG Test Positive
What the result means
A "Positive" Allo-FBGG result means that your baby has the blood group antigen that your antibody reacts to and that your baby is at risk for hemolytic disease of the fetus and newborn (HDFN).
Next steps
Your health-care provider will discuss monitoring for your pregnancy.
Monitoring may include:
- blood tests to check the antibody levels in your blood
- specialized ultrasounds to measure blood flow to the baby
- referral to a maternal-fetal medicine (MFM) specialist
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.