Nearly 140.000 preterm infants are born every year. Preterm infants spend their first few weeks or months of life outer environment which is more stressful (overstimulation, frequent hand-touch, painful procedures, remaining separate from the mother) than intrauterine environment due to its nature. Particularly pleasant and familiar scents are known to facilitate the psychophysiological adaptation of preterm infants to the environment for the first time and it is reported that it forms part of the binding event. Increasing number of studies in recent years report physiological variables that occur during inhalation of odors for both term and preterm infants. For example, its indicated that lemon-flavored cotton swab regulates the breathing of babies. Vanilla reduces the rate of apnea and prevents bradycardia. But its emphasized that the method for neonates should be studied more and impacts of the different odorants should be observed.