GSTM1 and hypertension, pregnancy-induced: A logistic regression model showed that risk factors of unsuccessful EBF practice 1 month after discharge included lower level of Hb categories (P < 0.001), higher maternal age (P < 0.001), nulliparity (P < 0.001), cesarean section (P < 0.001), pregnancy-induced hypertension (P = 0.012), gestational week (P = 0.002), postpartum obstetrical hemorrhage >500 ml (P = 0.011), LBW (P < 0.001), and immediate separation (P = 0.020).