The other group consisted of 155 pregnant women, who were recruited ≤14 gestational weeks based on the degree of anaemia; with severe anaemia: Hb ≤ 8 g/dL [4.96 mmol/L], mild-moderate anaemia: Hb 8.1–10.9 g/dL [5.02–6.81 mmol/L] or without anaemia: Hb ≥ 11 g/dL [6.82 mmol/L], Figure 1. This evidence concerns the gene GSTM1 and anemia (phenotype).