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What is significant about a single nursing session? An exploratory study.

Elizabeth M Miller1

  • 1Department of Anthropology, University of South Florida, 4202 East Fowler Ave, SOC107, Tampa, FL, 33620-7200.

American Journal of Human Biology : the Official Journal of the Human Biology Council
|April 6, 2017
PubMed
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Analyzing a single nursing session reveals key factors influencing infant growth. Hind milk fat percentage is negatively associated with infant length-for-age (LAZ), suggesting its importance in infant nutrition.

Area of Science:

  • Human lactation and infant nutrition.
  • Pediatric growth and development.

Background:

  • Breastfeeding research often relies on single nursing sessions, but their predictive characteristics are not fully understood.
  • Understanding the dynamics of a single nursing session is crucial for characterizing the mother-infant feeding relationship.

Purpose of the Study:

  • To explore relationships between variables within a single nursing session.
  • To investigate the association between single nursing session variables and infant length-for-age (LAZ) and weight-for-age (WAZ).

Main Methods:

  • Observed 63 mother-infant pairs in the United States.
  • Measured six variables: foremilk/hindmilk fat, infant milk intake, session duration, time since last session, and time of day.
  • Utilized principal factor analysis and multivariate analyses.

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Main Results:

  • Two factors emerged: overall milk fat percentage and breast emptying efficiency.
  • Hind milk fat percentage showed a significant negative association with infant LAZ (P=.01).
  • Overall milk fat percentage (Factor 1) was also negatively associated with infant LAZ (P=.05).

Conclusions:

  • This study describes the dynamics of a single nursing session.
  • Findings suggest that milk fat composition and breast emptying influence infant growth metrics like LAZ.
  • Provides insights into variations in infant growth and nutrition related to breastfeeding patterns.