a study on the relationship between duration of breastfeeding and some maternal and neonatal factors amirshahi m [1] *,shiri s [2] ,salehin sh [3] ,mohamad rezaei zh [4] received: 19 feb, 2013 accepted: 25 apr, 2013 abstract background & aims : breastfeeding has many benefits for mother and preterm infant. identify factors affecting breastfeeding, have an effective role in supportin...