Fetal-maternal erythrocyte distribution

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Kleihauer-Betke stain

A normal value indicates that no or few fetal cells are present in the maternal blood. The standard dose of RhoGAM is sufficient in this case.

A high fetal-maternal red blood cell ratio means there blood from the fetus is leaking into the mother's blood circulation. The greater the amount of fetal cells present, the greater the amount of Rh immune globulin the mother must receive.

Review Date: 09/19/2006
Reviewed By: Audra Robertson, MD, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.