GSTM1 and hemorrhage: Low maternal Hb was significantly associated with odds of postpartum hemorrhage (OR (95% CI) 1.69 (1.45–1.97)), transfusion (OR (95% CI) 3.68 (2.58–5.26)), pre-eclampsia (OR (95% CI) 1.57 (1.23–2.01)), and prenatal depression (OR (95% CI) 1.44 (1.24–1.68)).