Among pregnant women in third trimester receiving antenatal clinic at Mpigi health facilities, the mean haemoglobin was 11.5 (±1.38) g/dl and the prevalence of anaemia (Hb < 11.0 g/dl) was 32.5% (95% CI 30.6-34.3). This evidence concerns the gene GSTM1 and anemia (phenotype).