A Comparison Study of Feeding Prematures in the Side-lying Position on the Right and Left Side - a Pilot Study.

Inclusion Criteria: * circulatory and respiratory stability; * readiness for oral feeding according to each child's Speech-Language Pathologist assessment; * prematurely born infants who will be in the process of transfer from enteral nutrition to full oral feeding and will be fed orally at least 4 times within twenty-four hours; * researcher must be a right handed person (right hand is the dominant hand); * each infant will be fed with one kind of bottle and nipple; * parents will give a informed consent to participate their infant in the study. Exclusion Criteria: * disorders which could significantly affect the feeding course, such as cleft lip and/or palate, facial paralysis and/or congenital defects of the facial skeleton; * the presence of detected congenital abnormalities and metabolic diseases; * newborns after abdomen chirurgical treatment; * low Apgar score (less than 5 points at the 5th and 10th minute of the measurement); * administered analgesics, anticonvulsants and sedatives \<72 hours from extubation prior the trial; * parenterally fed infants; * infants with administered intravenous infusion with glucose; * parents refusal to participate in the study or when bottle-feeding will not be the parental preference.