Breastfeeding, prenatal depression and children's IQ and behaviour: a test of a moderation model

Rita Amiel Castro1,2, Vivette Glover3, Ulrike Ehlert4

  • 1Department of Clinical Psychology and Psychotherapy, Institute of Psychology, University of Zurich, Zurich, Switzerland. r.castro@psychologie.uzh.ch.

Insights

Breastfeeding is linked to higher child IQ and reduced hyperactivity, suggesting nutritional benefits. It does not moderate the effects of maternal prenatal depression on child development.

Area of Science:

  • Child Development
  • Neuroscience
  • Public Health

Background:

  • Investigating the link between breastfeeding and child neurodevelopment.
  • Examining associations with intelligence quotient (IQ) and behavioral issues.
  • Considering the impact of maternal prenatal depression and anxiety.

Purpose of the Study:

  • Determine breastfeeding's association with child IQ and behavior.
  • Assess if breastfeeding moderates prenatal depression's effects on neurodevelopment.
  • Adjust for crucial prenatal and postnatal confounders.

Main Methods:

  • Utilized data from the Avon Longitudinal Study of Parents and Children (n=11,096).
  • Assessed child IQ via standardized testing and behavior via parent reports.
  • Employed hierarchical multiple regression analysis with covariate adjustments.

Main Results:

  • Exclusive and mixed breastfeeding correlated positively with IQ at 8 years.
  • Exclusive breastfeeding linked to less hyperactivity at 4 years; mixed feeding to more at 9 years.
  • No significant associations found between breastfeeding and emotional or conduct problems.

Conclusions:

  • Breastfeeding's selective impact suggests nutritional, not psychological, benefits for neurodevelopment.
  • Breastfeeding does not moderate the relationship between prenatal maternal depression/anxiety and child neurodevelopment.
  • Maternal mental health and breastfeeding appear to influence child development through separate pathways.
Abstract

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