Effect of Breastfeeding Duration on Cognitive Development in Infants: 3-Year Follow-up Study

Hyungmin Lee1, Hyewon Park2, Eunhee Ha3

  • 1Department of Social and Child Welfare, Woosong University, Daejeon, Korea .

Insights

Longer breastfeeding duration is linked to improved infant cognitive development. Breastfeeding for nine months or more showed significantly better mental development index scores in infants.

Area of Science:

  • Pediatrics
  • Developmental Psychology
  • Public Health

Background:

  • Cognitive development in early childhood is crucial for long-term outcomes.
  • Understanding the impact of infant feeding practices on cognitive trajectories is essential.
  • The Mothers' and Children's Environmental Health (MOCEH) study provides a valuable cohort for investigating these associations.

Purpose of the Study:

  • To examine the relationship between breastfeeding duration and cognitive development in infants.
  • To assess the impact of breastfeeding on the Mental Development Index (MDI) score.
  • To determine if a minimum duration of breastfeeding confers significant cognitive benefits.

Main Methods:

  • A multi-center birth cohort study in Korea involving 697 infants.
  • Infants were assessed at 12, 24, and 36 months using the Korean version of the Bayley Scales of Infant Development II (K-BSID-II).
  • Multiple linear regression analysis was employed to analyze the association between breastfeeding duration and MDI scores, adjusting for covariates.

Main Results:

  • A positive correlation was observed between breastfeeding duration and MDI scores.
  • Infants breastfed for nine months or longer demonstrated significantly better cognitive development compared to non-breastfed infants.
  • The duration of breastfeeding was a significant predictor of cognitive development in the first three years of life.

Conclusions:

  • Extended breastfeeding, particularly for nine months or more, is associated with enhanced cognitive development in infants.
  • These findings underscore the importance of promoting longer breastfeeding durations for optimal infant brain development.
  • The study contributes evidence supporting breastfeeding as a key factor in early cognitive trajectories.

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