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Table of Contents
Vol. 92, No. 2, 2007
Issue release date: August 2007
Section title: Review
Free Access
Neonatology 2007;92:73–82

The Assessment of Newborn Iron Stores at Birth: A Review of the Literature and Standards for Ferritin Concentrations

Siddappa A.M.a · Rao R.b · Long J.D.c · Widness J.A.d · Georgieff M.K.b
aDivision of Neonatology, Hennepin County Medical Center, and Department of Pediatrics, University of Minnesota School of Medicine, bDivision of Neonatology, Department of Pediatrics, University of Minnesota School of Medicine, and cDepartment of Educational Psychology, College of Education and Human Development, University of Minnesota, Minneapolis, Minn., dDivision of Neonatology, Department of Pediatrics, University of Iowa School of Medicine, Iowa City, Iowa, USA
email Corresponding Author

Michael K. Georgieff, MD

MMC 39, D-136 Mayo Building

420 Delaware St. SE

Minneapolis, MN 55455 (USA)

Tel. +1 612 626 2971, Fax +1 612 624 8176, E-Mail georg001@umn.edu

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Background: Serum ferritin measurements are used in clinical populations to estimate total body iron stores and the risk of subsequent iron deficiency or overload. The lack of normative newborn serum ferritin concentration data between 23 and 41 weeks has led to difficulty in establishing the incidence and degree of abnormal iron status in the neonatal period. Objectives: The primary objective of this review was to summarize the maternal and gestational factors that determine ferritin concentrations in full-term and pre-term newborn infants and to generate comprehensive reference values. The secondary objective was to assess serum ferritin concentrations in newborn infants at risk for abnormal fetal iron metabolism, including maternal diabetes mellitus, intrauterine growth restriction and maternal smoking during pregnancy. Methods: Serum ferritin and gestational age data at birth from 457 low-risk pre-term and term infants of 23–41 weeks gestation obtained from 35 published studies reviewed from a period of 25 years and from recently collected data from our centers were assessed by regression analysis. Slopes and intercepts of the high-risk groups were compared with the standard curve. Results: Umbilical cord serum ferritin concentrations increased with advancing gestational age, from a mean of 63 µg/l at 23 weeks to 171 µg/l at 41 weeks gestation (p < 0.001). The infants of diabetic mothers had a lower intercept than the control infants (p < 0.001). Conclusions: Iron deficiency and overload have been implicated in neurodevelopmental impairments. Normative cord serum ferritin data may permit a more precise assessment of infants who are at risk for abnormal iron status at birth.

© 2007 S. Karger AG, Basel

Article / Publication Details

First-Page Preview
Abstract of Review

Received: July 11, 2006
Accepted: December 17, 2006
Published online: March 14, 2007
Issue release date: August 2007

Number of Print Pages: 10
Number of Figures: 2
Number of Tables: 2

ISSN: 1661-7800 (Print)
eISSN: 1661-7819 (Online)

For additional information: http://www.karger.com/NEO

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