Methods: A randomized controlled trial has been designed. All mother-infant pairs will be randomized to either receive the written information of the name of a breast milk substitute on the infant's discharge documents (group A) or not to receive it (group B). Mothers will receive a phone interview on mode of infants' feeding at 7 days,1, 2 , 3 and 6 months after delivery. Reasons for early discontinuation of breastfeeding according to mothers' opinion will be also collected.