Based upon Kieihauer-Betke test results, which of the following formulas is used to determine the volume of the fetomaternal hemorrhage (FMH) expressed as whole blood?
1) FMH (mL) = (Number of fetal cells/Total number of cells) x Maternal blood volume
2) FMH (mL) = (Number of maternal cells/Total number of cells) x Fetal blood volume
3) FMH (mL) = (Number of fetal cells/Total number of cells) x Fetal blood volume
4) FMH (mL) = (Number of maternal cells/Total number of cells) x Maternal blood volume



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