Hassan Boskabadi - Department of pediatric, associate professor, Neonatal research center, Mashhad University of Medical Sciences, Mashhad, Iran
Gholamali Maamouri - Department of pediatric, professor of Neonatology, Mashhad University of Medical Sciences, Mashhad, Iran
Fatemeh Khatami - Department of Pediatrics, Neonatal Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
Mohammad Ali Kiani - Department of Pediatrics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.

Background: Inadequate milk intake during the first year of neonate’s life can result in weight loss, severe hyperbilirubinemia, and sometimes hypernatremia. In this study, we aimed to determine the relationship between neonatal weight loss and hypernatremia in term breastfed infants with idiopathic jaundice, as well as the necessity of sodium concentration measurement in newborns with idiopathic jaundice via weight loss measurement. Methods: In this cross-sectional study, we examined 273 infants with jaundice of unknown etiology at Ghaem Hospital, Mashhad, in years 2008-2012. The study sample consisted of 226 infants in the control group (serum sodium concentration

Jaundice, Hypernatremia, Weight loss, Dehydration, neonatal risk factors