Genomics for the Global Good

NCBGG provides state-of-the-art molecular testing for donor centers and patients they serve.

Blog: Blood Experts

What Is the Diversity and Distribution of RhD Phenotypes & Genotypes in Different Populations?

Unlike other blood group antigens that are either positive or negative when tested in the laboratory, RhD antigens are diverse in both phenotype and genotype. They also vary between ethnic groups.

Blood Experts Blog

How RHD Genotyping Provides a Solution for Pregnant Women with a Serologic Weak D Phenotype

RhD serologic typing, while beneficial, has inherent limitations that affect both obstetric patients and their OB-GYNs. Fortunately, RHD genotyping can help.

Blood Experts Blood

Benefits of RHD Genotyping for Pregnant Women & Their OB-GYNs

The benefits of RHD genotyping are vast, including more efficient obstetric care and significant cost savings.


Why Do Some Pregnant Women Type as Both Rh Positive & Rh Negative?

Consistency is essential to quality healthcare, but Rh typing methods are associated with discrepancies that OB-GYNs need to be aware of.

National Center for Blood Group Genomics

RHCE Table

The purpose of the table is to document RHCE alleles that have been reported associated with a clinical presentation, be it altered antigen expression on the RBCs and/or antibody production in a patient.


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NCBGG provides the highest quality testing services for extended blood typing at lower cost for donor centers and the patients they serve to improve the practice of transfusion medicine, to develop the next generation of testing, and to train the next generation of leaders.

NCBGG Products & Services

Genomics Testing Services

DNA-based testing for extended blood typing for donors and patients

Comprehensive Antigen Profiles

Detailed red cell and platelet antigen profiles on patient and donor samples

Fetal and Neonatal

Testing, Treatment and Management Options, including RhD and K typing

Precise Match Blood Products

Precise Match products enhance patient care

Blood Experts Blog

Why Do Some Pregnant Women Type as Both Rh Positive & Rh Negative? Consistency is essential to quality healthcare, but current Rh typing methods are causing significant discrepancies that OB-GYNs need to address.