Cortisol in Neonatal Mother's Milk Predicts Later Infant Social and Cognitive Functioning in Rhesus Monkeys

Amanda M. Dettmer, Ashley M. Murphy, Denisse Guitarra, Emily Slonecker, Stephen J. Suomi, Kendra L. Rosenberg, Melinda A. Novak, Jerrold S. Meyer, Katherine Hinde

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Milk provides not only the building blocks for somatic development but also the hormonal signals that contribute to the biopsychological organization of the infant. Among mammals, glucocorticoids (GCs) in mother's milk have been associated with infant temperament. This study extended prior work to investigate rhesus monkey (Macaca mulatta) mother–infant dyads (N = 34) from birth through 8 months postpartum. Regression analysis revealed that cortisol concentrations in milk during the neonatal period predicted impulsivity on a cognitive task, but not global social behaviors, months later. During this time period, sex-differentiated social behavior emerged. For female infants, milk cortisol concentrations predicted total frequency of play. Collectively, these findings support and extend the “lactational programming” hypothesis on the impact of maternal-origin hormones ingested via milk.

Original languageEnglish (US)
Pages (from-to)525-538
Number of pages14
JournalChild development
Volume89
Issue number2
DOIs
StatePublished - Mar 1 2018

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Education
  • Developmental and Educational Psychology

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