Background: Despite the use of parenteral nutrition cycling (PNC) in neonatal intensive care units (NICU), there is limited evidence regarding the benefits in relation to the nutrición parenteral total (NPT) in term and late preterm infants. The recommendations from the recently published Latin American Society of Gastroenterology, Hepatology and Pediatric Nutrition guidelines are substantially different in this area, and surveys have reported variations in clinical practice. The aim of this randomised controlled trial (RCT) is to evaluate the benefits and risks of PNC AND parenteral nutrition total (NPT) in term and late preterm infants.