an 85-item observational measure of oral feeding skill. It will be used for assessing oral feeding through maturation of oral feeding skill. The MEFSA includes 3 main sections; pre-feeding, during feeding and post-feeding sections. The "during feeding" section, "Oral Feeding Maintenance" will be used in this study which supports infant based feeding that give the infant opportunity to communicate and express stress signals that must be respected. It proposed to observe the infant from moment to moment during feeding. This section composed of 30 items to assess infant abilities to (a) remain engaged in feeding, (b) organize oral-motor skills, (c) maintain physiologic stability and (d) coordinate SSB.

FEES will be done with presentations of food and/or milk consistency (Secretions, thin and thick fluids, puree and/or solids) to obtain multiple trials of each texture. Infants who are fed only milk, FEES will be performed either with bottle-feeding or 5ml syringe (without needle) with the milk.

Each infant will be fed by his or her typical caregiver or by the nurse. The feeding protocol began by presenting the infants with the bottle and/or nipple. If no aspiration occurred on the initial swallows, then the infant will be allowed to suck on the bottle until there was a change in swallowing function, 60 ml was finished, or the infant refused to suck.

score (1) stand for nothing by mouth, score (2) Tube dependent, with minimal attempts at liquids or food, score (3) Tube dependent, with consistent intake of liquids or food, score (4) Total oral diet, but requiring special preparation of liquids (ie, thickened liquids) +/- compensations, score (4.5) Total oral diet, but requiring special preparation of solids (eg, foods of different texture and/or liquid supplements) +/- compensations, score (5) Total oral diet, without special preparation (ie, regular thin fluids, foods of same texture as peers, and no additional liquid supplements), but with compensations, score (6) Total oral diet, with no restrictions