GSTM1 and anemia (phenotype): The level of haemoglobin used for classification of anaemia in pregnant women as mild, moderate and severe are those recommended by the Indian Council of Medical Research (ICMR) as follows: mild anaemia (Hb 10.0-10.9 mg/dl), moderate anaemia (Hb 7.0-10.0 mg/dl), severe anaemia (Hb 4-7.0 mg/dl), very severe anaemia (Hb less than 4.0 mg/dl).