Effects of Olfactory and Gustatory Stimulus on the Nutrition of Premature Babies

The objective of this clinical trial is to test the effects of olfactory and taste stimulation with milk or water in premature newborns with a gestational age between 28 and 32 weeks. The main question researchers want to resolve is: • Does olfactory and gustatory stimulation in these newborns reduce the time spent with an oral or nasogastric feeding tube and bring forward oral feeding? Participants will be stimulated with milk or water depending on the randomly chosen group. 1: the olfactory stimulus (with smell) will be performed with a sterile cotton swab close to the nostrils immediately before feeding through the tube, 2: the gustatory stimulus (taste) will be performed with a sterile cotton swab on which a drop of milk or water will be applied on the newborn's tongue if they are awake or on their lips if they are sleeping, and is performed immediately before tube feeding.