Inclusion Criteria:  Preterm infants;  Whose legal representatives agree to take part in the study and sign the informed consent form, Who have a stable clinical picture, Who are on the first day of enteral feeding will be included in the study.  Exclusion Criteria:  Preterm infants;  Who have a comorbidity, Who are intubated, Who have an inherent anomaly, Who have parenteral feeding will not be included in the study.