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Trace elements in meconium from preterm and full-term infants.

J K Friel1, J D Matthew, W L Andrews

  • 1Department of Biochemistry, Memorial University of Newfoundland, St. John's, Canada.

Biology of the Neonate
|January 1, 1989
PubMed
Summary
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Full-term infants excrete significantly more zinc, copper, and manganese in meconium than preterm infants. Iron and chromium losses are higher in preterm infants, suggesting differential absorption during gestation.

Area of Science:

  • Neonatal Nutrition
  • Trace Element Metabolism

Background:

  • Meconium composition reflects fetal development and nutrient exposure.
  • Trace elements are crucial for infant growth and development.
  • Premature birth can impact nutrient acquisition and retention.

Purpose of the Study:

  • To compare the meconium excretion of key trace elements (zinc, copper, manganese, iron, chromium) between preterm and full-term infants.
  • To investigate the relationship between gestational age and trace element losses in meconium.

Main Methods:

  • Meconium samples were collected from 23 preterm and 27 full-term infants.
  • Atomic absorption spectrometry was used to quantify zinc, copper, manganese, chromium, and iron concentrations.
  • Excretion levels were compared between the two infant groups.

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Main Results:

  • Full-term infants showed significantly higher meconium excretion of zinc, copper, and manganese compared to preterm infants (p < 0.05).
  • No significant difference was observed in iron or chromium excretion between the groups.
  • Two preterm infants exhibited unusually high iron losses in meconium.
  • Zinc, copper, and manganese losses appear to increase with gestational age.

Conclusions:

  • Meconium trace element content differs between preterm and full-term infants, particularly for zinc, copper, and manganese.
  • Iron and chromium losses may occur early in gestation and are potentially reabsorbed by term infants.
  • These findings highlight potential differences in trace element metabolism and retention based on gestational maturity.