Perinatal aspects of iron metabolism

Area of Science:

• Neonatal Medicine
• Pediatric Nutrition
• Hematology

Background:

• Iron is crucial for developing fetal and neonatal organ systems, primarily for hemoglobin synthesis.
• Iron deficiency can affect non-heme tissues like the brain and heart before anemia is evident.
• Conditions such as maternal iron deficiency, hypertension, diabetes, and prematurity can lead to lower newborn iron stores.

Purpose of the Study:

• To highlight the critical role of iron in fetal and neonatal development.
• To identify risk factors for iron deficiency and overload in newborns, particularly preterm infants.
• To emphasize the need for monitoring and managing iron status in vulnerable infants.

Main Methods:

• Review of physiological iron distribution and prioritization in fetuses and neonates.
• Analysis of gestational and neonatal factors influencing iron stores.
• Discussion of risks associated with iron deficiency and overload in preterm infants.

Main Results:

• Iron is preferentially directed to hemoglobin synthesis, potentially leading to iron deficiency in other tissues.
• Premature infants, especially those with very low birth weight, are at high risk for early postnatal iron deficiency.
• Sick, multiply transfused preterm infants are susceptible to iron overload due to immature defense mechanisms.

Conclusions:

• The iron status of preterm infants is highly variable.
• These infants are at significant risk for both iron deficiency and iron toxicity.
• Close monitoring and appropriate iron support are essential during the newborn period and after discharge.