Rh Type

Catalog information reviewed: August 24, 2026 by the Sunridge Medical clinical team.

What this laboratory test evaluates

DetailsRh Type – This test is crucial for identifying antibodies to antigens in the ABO and Rh systems, which are the primary causes of hemolytic disease of the newborn. Understanding the Rh type is essential for preventing potential complications in newborns.

What patients is this test right for?This test is particularly important for pregnant women to help assess the risk of hemolytic disease of the newborn, a condition where the blood types of the mother and baby are incompatible.

What type of sample is required for this test?5 mL whole blood collected in an EDTA (pink-top) tube. A blood draw is necessary.

Additional test information

This test is crucial for identifying antibodies to antigens in the ABO and Rh systems, which are the primary causes of hemolytic disease of the newborn. Understanding the Rh type is essential for preventing potential complications in newborns.

Collection and processing

• Sample type: Whole blood
• Fasting: No
• Estimated laboratory processing: Results should be available in 2 – 5 business days after the sample is collected

How Sunridge uses laboratory information

Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.

Before requesting this test

Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.