This randomised controlled trial was performed on 136 healthy term newborns in the maternity ward of a tertiary hospital. The inclusion criteria were as follows: healthy term neonates (37-416 weeks of gestation) confirmed through a routine physical exam during the first 24h of life, wish to breastfeed and absence of feeding during the previous 60 minutes. Exclusion criteria were as follows: maternal use of opioids, birth in general anesthesia, artificial feeding, previous capillar or venous sampling, and previous admission to the neonatal unit.