GSTM1 and hypertension, pregnancy-induced: A logistic regression model showed that risk factors of unsuccessful EBF initiation at discharge included lower level of Hb categories (P < 0.001), higher maternal age (P < 0.001), nulliparity (P < 0.001), cesarean section (P = 0.003), pregnancy-induced hypertension (P = 0.002), gestational weeks (P = 0.006), postpartum obstetrical hemorrhage >500 ml (P = 0.089), LBW (P < 0.001), and immediate separation (P < 0.001).