Background: The initiation and achievement of full oral feedings presents a challenge for the preterm infants. Therefore, there is a need to determine when to initiate oral feeding for preterm infants. Aim: This study aimed to assess the time predictors to achieve full oral feeding in preterm infants. Research settings: The study was carried out at the neonatal intensive care units (NICU) in Tahrir General Hospital and Helwan General Hospital.