GSTM1 and Stillbirth: During the first trimester, low maternal Hb was associated with increased odds of the following adverse birth outcomes: LBW (OR (95% CI) 1.31 (1.16–1.49)), VLBW (OR (95% CI) 3.21 (1.06–9.71)), PTB (OR (95% CI) 1.22 (1.15–1.31)), SGA (OR (95% CI) 1.12 (1.04–1.21)) and stillbirth (OR (95% CI) 1.54 (1.12–2.12)).