Fetal RHD Screening

Fetal RHD Screening is publicly funded for Ontario residents who:

• Are RhD negative
• Do not have anti-D antibodies
• Are pregnant with one baby 

• Fetal RHD screening can be done as early as 11 weeks in your pregnancy.

·       This test uses a sample of your blood. During pregnancy, small pieces of genetic material from the placenta circulate in your blood. The lab looks at this material to predict your baby’s RhD blood type.

• Your blood can be drawn at a community lab and sent to Canadian Blood Services for testing. Use our map to find a lab near you.

• Results are ready in about 10 business days and are sent to your healthcare provider.

• If your baby is RhD positive, your provider will recommend RhD Immune Globulin (RhIG) later in pregnancy (and after birth) to help prevent complications in a future pregnancy.
• If your baby is RhD negative, RhIG is not needed.
• Learn more about Fetal Blood Type Results & Next Steps

• After delivery, your baby’s RhD blood type will be confirmed using a blood sample from the umbilical cord.