“…There are variations in the methods of application for all techniques and scarce scientific evidence in the comparison between them (6,7,8,9,10,11,12) . Moreover, there is a lack of systematic and scientific data on the benefit or harm of these techniques, during the period of hospitalization of PTNB and after hospital discharge (1) . NNS consists of the insertion a gloved finger (5 th digit) into the oral cavity of the newborn, touching the incisive papilla, where the suction reflex is triggered (7,8) .…”