The two modes of non-invasive ventilation, NIPP and specially NCPAP, have been used frequently in the respiratory care of preterm infants in neonatal units.NCPAP is currently a common practice for the treatment of RDS . NIPP has been found to be more effective than NCPAP in apnea of prematurity and immediately after extubation in preterm infants,decreasing the need of endotracheal ventilation.