If the protein is present, your blood is Rh positive; if it is absent, your blood is Rh negative. The rarity of negative types, combined with the universal need for compatible blood, underscores the importance of widespread donor screening.
How Rh Factor Antibodies Are Produced and Why It Matters
Understanding your blood type involves more than just the letters A, B, AB, or O. Consequently, medical professionals strictly match Rh status to ensure the safety and efficacy of blood transfers.
Rh-negative mothers are routinely screened early in pregnancy. If the baby is Rh-positive, the mother receives an injection of Rh immunoglobulin (RhIg), commonly known as RhoGAM.
How Rh Factor Antibodies Develop During Pregnancy
This injection works by "masking" any fetal blood cells that entered the mother's bloodstream, preventing her immune system from recognizing them and producing harmful antibodies. The Science Behind the Antigen Genetically, the Rh factor is determined by the presence of the RHD gene.
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