Mother infant cortisol levels and maternal childhood adversity
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View abstract on PubMed
Summary
This summary is machine-generated.Maternal and infant cortisol levels show early synchrony that decreases over time, influenced by maternal stress and childhood experiences. This highlights the lasting impact of maternal adversity on infant stress physiology.
Area Of Science
- Neuroendocrinology
- Developmental Psychology
- Stress Physiology
Background
- Cortisol is a key biomarker for the hypothalamus-pituitary-adrenal (HPA) axis, crucial for stress regulation and neurodevelopment.
- While maternal and infant cortisol links are known, their synchrony in early infancy requires further investigation.
- Early infancy is a critical period for rapid neuroendocrine development and stress system maturation.
Purpose Of The Study
- To examine cortisol coupling between mothers and infants during early postpartum development.
- To investigate the correlation between maternal adverse childhood experiences (ACEs) and maternal/infant cortisol dynamics.
- To understand the longitudinal changes in HPA axis synchrony from 1 to 6 months postpartum.
Main Methods
- Longitudinal study of 305 mother-infant dyads in São Paulo, Brazil.
- Salivary cortisol measurements at approximately 1 and 6 months postpartum.
- Bivariate latent change score modeling to assess intra- and interindividual cortisol dynamics and coupling.
Main Results
- Positive correlation between maternal and infant cortisol at 1 month (r=0.319) and 6 months (r=0.208), indicating early synchrony that diminishes.
- Negative self-feedback observed in both mothers and infants: higher baseline cortisol predicted smaller changes.
- Maternal ACEs predicted higher baseline maternal cortisol (B=0.126) but did not influence the rate of change.
Conclusions
- Mother-infant cortisol synchrony is present in early infancy but gradually decouples.
- Maternal adversity, indicated by ACEs, has lasting effects on postpartum maternal stress physiology.
- Findings underscore the importance of maternal HPA axis regulation for infant neuroendocrine development.
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