The revised Hb cutoff for pregnant women is categorized by trimesters: for first trimester, ≥ 11 g/dL (no anemia), 10–10.9 g/dL (mild anemia), 7–9.9 g/dL (moderate anemia), and < 7 g/dL (severe anemia); for second trimester, ≥ 10.5 g/dL (no anemia), 9.5–10.4 g/dL (mild anemia) 7–9.4 g/dL (moderate anemia), and < 7 g/dL (severe anemia); and for third trimester, ≥ 11 g/dL (no anemia), 10–10.9 g/dL (mild anemia), 7–9.9 g/dL (moderate anemia), and < 7 g/dL (severe anemia). The gene discussed is GSTM1; the disease is anemia (phenotype).