GSTM1 and anemia: Laboratory workup showed white blood cell (WBC) count of 15.9/mcL (4-10.6/mcL) with 90% neutrophils and hemoglobin (Hb) of 8.8 mg/dL (12-16 mg/dL) with a low mean corpuscular volume (MCV) and mean corpuscular hemoglobin concentration (MCHC) indicative of microcytic and hypochromic anemia, consistent with her previously diagnosed anemia of pregnancy.