Preterm infant were randomized into an experimental or an control group. Infants in the experimental group receive an oral stimulation program consisting of stimulation of the oral structures during 10 consecutive days. Infant in the control group receive no stimulation only non nutritive sucking during feeding. Both were administered twice per day, during 20 minutes, 48 hours after discontinuation of nasal continuous positive air pressure. A long term evaluation of oral feeding difficulties and neuromotor development are organized.