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Updated: Feb 28, 2026

Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
Published on: May 10, 2022
[Iron requirements during the first 6 months of life]
1Service de pédiatrie et réanimation néonatales, hôpital universitaire Necker-Enfants malades, 149 boulevard Sèvres, 75014 Paris, France; Université Paris-Descartes, Paris, France.
Insights
Term infants typically don't need iron for the first 6 months. However, premature and low birth weight infants require early iron supplementation due to lower stores and higher growth demands.
Area of Science:
- Neonatal Medicine
- Pediatric Nutrition
- Hematology
Background:
- Term infants generally have sufficient iron stores for the first six months post-birth.
- Factors like gestational age, gender, maternal iron status, and placental transfer impact neonatal iron stores.
- Low birth weight (LBW) infants are born with reduced iron reserves.
Purpose of the Study:
- To outline the iron supplementation needs and strategies for infants.
- To highlight the importance of iron for LBW and premature infants.
- To recommend interventions for optimizing neonatal iron status.
Main Methods:
- Review of factors influencing neonatal iron stores.
- Analysis of iron requirements for catch-up growth in LBW infants.
- Evaluation of different iron supplementation methods (enteral, preterm formula, enriched breast milk).
- Consideration of delayed umbilical cord clamping for preterm infants.
Main Results:
- Term infants usually do not require iron supplementation in the first 6 months.
- Premature and LBW infants have increased iron needs due to lower birth stores and higher demands.
- Early and higher-dose iron supplementation is recommended for more premature infants.
- Delayed umbilical cord clamping benefits neonatal iron status and reduces morbidity.
Conclusions:
- Iron supplementation strategies should be tailored based on birth weight and gestational age.
- Preventive iron strategies are crucial for LBW and preterm infants.
- Delayed umbilical cord clamping is a recommended practice for preterm infants to improve iron status.
Abstract:
Because of the postnatal redistribution of the iron store, the term infant born after an uneventful pregnancy virtually needs no iron during its first 6 months of life. On the other hand, several factors, such as duration of gestation, gender, mother's iron status, alteration of the iron placental transfer, significantly influence the iron store at birth. Because of their reduced body store at birth and their higher demand during catch-up growth, low birth weight infants should receive an iron supplement, which should be started earlier and given at a higher dose in the more premature infants. This preventive strategy can be given as enteral supplement, preterm formula, or enriched breast milk. Finally, because of its benefits on neonatal morbidity and iron status, delayed umbilical cord clamping is recommended for preterm infants.
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