GSTM1 and anemia (phenotype): Of the anemic pregnant women, 151 (58.5%), 92 (35.7%), and 15 (5.8%) had mild anemia (Hb ranges 10.0–10.9 g/dL), moderate anemia (Hb ranges 7.0–9.9 g/dL), and severe anemia (Hb < 7.0 g/dL), respectively (Figure 1).