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Prenatal Hemoglobin Concentration and Long-Term Child Neurocognitive Development.

Michael O Mireku1, Michael J Boivin2, Roméo Zoumenou3,4

  • 1College of Health and Science, University of Lincoln, Lincoln, United Kingdom.

The American Journal of Tropical Medicine and Hygiene
|December 17, 2024
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Summary
This summary is machine-generated.

Maintaining adequate hemoglobin levels during pregnancy is crucial for child development. Anemia in mothers is linked to lower neurocognitive scores in children at age six, highlighting the importance of prenatal care.

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Area of Science:

  • Obstetrics and Gynecology
  • Pediatric Neurology
  • Hematology

Background:

  • Anemia in pregnancy, defined as hemoglobin (Hb) <110 g/L, is a significant public health issue in sub-Saharan Africa, contributing to maternal and infant morbidity and mortality.
  • Physiological and pathological changes in maternal Hb occur during pregnancy, but their long-term impact on child neurocognitive development remains understudied.

Purpose of the Study:

  • To investigate the association between maternal hemoglobin levels and trajectories during pregnancy and neurocognitive function in children at age six.
  • To identify distinct patterns of maternal hemoglobin changes throughout gestation and their correlation with long-term child developmental outcomes.

Main Methods:

  • Prospective cohort study involving 6-year-old children whose mothers participated in an antimalarial drug trial.
  • Maternal hemoglobin levels were measured at least twice during pregnancy and at delivery.
  • Group-based trajectory modeling was used to define prenatal Hb trajectories, followed by neurocognitive and motor function assessments in children.

Main Results:

  • Three distinct maternal Hb trajectories were identified: persistently anemic, anemic to nonanemic, and persistently nonanemic.
  • Children born to mothers with persistently anemic or anemic-to-nonanemic Hb trajectories exhibited significantly lower neurocognitive scores compared to those from persistently nonanemic pregnancies.
  • Specifically, adjusted analyses showed significant negative associations between anemic trajectories and child neurocognitive scores (β = -6.8 and β = -6.3).

Conclusions:

  • Maintaining maternal hemoglobin levels at or above 110 g/L from the second to third trimester of pregnancy is associated with optimal long-term neurocognitive function in children.
  • Prenatal anemia, even if transient, may have lasting detrimental effects on child neurodevelopment.
  • These findings underscore the critical importance of monitoring and managing maternal anemia throughout pregnancy to support optimal child cognitive outcomes.