Effect of First Oral Feeding by the Mother on Preterm Infants' Feeding Performance and Physiological Symptoms

The goal of this clinical trial is to evaluate the effect of breastfeeding on the infant's test weight and physiological characteristics (oxygen saturation and heart rate) in preterm infants in the Neonatal Intensive Care Unit during the transition to oral feeding.The main question it aims to answer are:• Is there a difference in test weight and physiological parameters between the infants in whom the first oral feeding was performed by the mother and the infants in whom the first oral feeding was performed by the intensive care unit nurse with a bottle? Researchers will compare the breastfed group with the bottle-fed group to see if there are differences in test weight and physiological parameters.

Inclusion Criteria:Gestation week at birth determined according to the mother's last menstrual date is 26-31+6 weeks,Postmenstrual week at the time of the study was 32-39+6 weeks,Having a body weight of 1500 grams or more at the time of inclusion in the study,Suggested by the physician to switch to oral nutrition and switched from enteral nutrition to oral nutrition for the first time,Breastfed,Preterm infants whose parents' consent was obtained for inclusion in the study and whose parents signed the informed consent formExclusion Criteria:Receiving oxygen,Craniofacial anomalies such as cleft palate, cleft lip, facial muscle paralysis,Preterm infants with any gastrointestinal, neurological and genetic disease (necrotizing enterocolitis, third and fourth level intracranial hemorrhage, periventricular leukomalacia, hydrocephalus, down syndrome, omphalocele, non-gastrodeia, short bowel syndrome and other diseases)