Studies in the literature on the effects of newborn bath types on the effects of body temperature on newborn crying times, on the effects of newborn behavior and stress, the views and practices of mothers with newborn babies on baby bathing, and the effects of bath types on the umbilical cord in term babies, and the effects of bath products on newborns. It seems that there are studies done. However, although studies on the effect of the cleaning product used in the first bath of late preterm and term newborns on the skin barrier are limited in number for term newborns, there are almost no studies for late preterm newborns. The hypotheses of this study are as follows; 1. In late preterm and term newborns, the first bath with cleaning product protects the newborns' Transepidermal Fluid Loss better than the first bath with only water. 2. In late preterm and term newborns, the first bath with cleansing product keeps the skin pH levels of newborns at a more optimal level compared to the first bath with only water.
The aim of this study is to determine the effect of the newborn's first bath with a cleaning product and only water on the barrier function of the skin.