title: Comparison of Maternal and Umbilical Cord Blood Selenium Levels in Low and Normal Birth Weight Neonates.
abstract: OBJECTIVE
  To compare the maternal and umbilical cord serum selenium concentrations in Low and normal birth weight neonates.
  
  
  METHODS
  A case-control study was carried out in Vali-Asr and Akbarabadi Hospitals (Jan. to Dec. 2013). Two groups; case group; 91 mothers who delivered a low birth weight (LBW) neonate and control group; 86 subjects who delivered a normal birth weight neonate were selected. Immediately after birth, 5 ml of maternal blood and umbilical cord blood were collected, and sent to laboratory to assay Se concentrations. To compare both groups' blood Se concentration, data were analyzed in SPSS 16.0.
  
  
  RESULTS
  Eighty six (48.6%) mothers with normal birth weight neonates and 91 (51.4%) mothers with low birth weight infants entered the study. Mean maternal mothers' age and mean maternal blood Se were 28.55 + 5.90 years and 79.3756+26.46915. A significant association was seen between maternal blood and cord blood Se level in control and case group (P value < 0.0001, r = 0.69) and (P value<0.001, r = 0.79). On the other hand no differences were seen between 2 groups' maternal blood Se level (P Value = 0.65). Umbilical Cord blood Se concentration was not also different between case and control group (P value = 0.46).
  
  
  CONCLUSIONS
  We found that maternal and umbilical cord blood Se concentrations were not different in low and adequate birth weight infants, however; umbilical cord Se concentrations were positively correlated with maternal blood Se concentrations.
authors.affiliation: Maternal, Fetal and Neonatal Research Center AND School of Nutritional Sciences and Dietetic, Department of Clinical Nutrition, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Lyly
authors.initials: L
authors.lastname: Nazemi
authors.affiliation: Maternal, Fetal and Neonatal Research Center, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Mamak
authors.initials: M
authors.lastname: Shariat
authors.affiliation: School of Nutritional Sciences and Dietetic, Department of Clinical Nutrition, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Chamari
authors.affiliation: Department of Cellular and Molecular, School of Nutritional Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Chahardoli
authors.affiliation: Breastfeeding Research Center, Tehran University of Medical Sciences, Tehran-Iran.
authors.forename: Leila
authors.initials: L
authors.lastname: Asgarzadeh
authors.affiliation: Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine AND Fetal and Neonatal Research Center, Tehran University of Medical Sciences Tehran, Iran ; Maternal, Fetal and Neonatal Research Center AND School of Nutritional Sciences and Dietetic, Department of Clinical Nutrition, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Fariba
authors.initials: F
authors.lastname: Seighali
keywords: LBW neonates; Normal birth weight neonates; Selenium level; maternal blood; umbilical cord blood