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  • Title: Rh Immunoprophylaxis for Women With a Serologic Weak D Phenotype.
    Author: Virk M, Sandler SG.
    Journal: Lab Med; 2015; 46(3):190-4. PubMed ID: 26199257.
    Abstract:
    It is standard practice for pregnant RhD-negative women who have not already formed anti-D to receive antepartum Rh immunoprophylaxis and, if they deliver an RhD-positive neonate, to receive postpartum Rh immunoprophylaxis. An estimated 0.6% to 1.0% of white women have red blood cells that express a serologic weak D phenotype. Of these women, approximately 80% will have a weak D type 1, 2, or 3 that could be managed safely as RhD-positive. Surveys of laboratory practice reveal a lack of standards for interpreting the RhD type for women with a serologic weak D and for determining their need for Rh immunoprophylaxis. RhD genotyping is recommended to determine the molecular basis of serologic weak D phenotypes in pregnant women as a basis for determining their candidacy for Rh immunoprophylaxis.
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