Further studies have also revealed that in 50% of the cases where women had Hb <10.5 g/dL during delivery, they had developed moderate to severe postpartum anemia with decreased levels of Hb (below 9.5 g/dL).8,10 Also, the health of the newly born is also affected if the mother is anemic. This evidence concerns the gene GSTM1 and anemia (phenotype).