Mothering revisited: A role for cortisol?

Area of Science:

• Neuroendocrinology
• Developmental Psychology
• Maternal-Infant Health

Background:

• The maternal hypothalamic-pituitary-adrenal (HPA) axis plays a crucial role during pregnancy and the postpartum period.
• Peripartum HPA axis function is linked to maternal behavior, stress reactivity, and emotional regulation.
• Animal studies provide experimental context for human correlational findings.

Purpose of the Study:

• To review the involvement of the maternal HPA axis in pregnancy and postpartum.
• To explore the association between maternal and infant HPA axis function.
• To examine the role of maternal sensitivity and traumatic factors in mother-infant co-regulation.

Main Methods:

• Selective literature review of human and animal studies.
• Analysis of correlational data on HPA axis function and maternal behavior.
• Exploration of associations under non-stressful and stressful conditions.

Main Results:

• The HPA axis supports adaptation to normative processes, such as maternal care, alongside its role in stress response.
• Maternal HPA axis function shows dynamic, time-dependent relationships with maternal behavior.
• Factors like sampling methods, population characteristics, and stress levels influence study outcomes.

Conclusions:

• The maternal HPA axis is integral to maternal adaptation and infant interaction, exhibiting context-dependent effects.
• Understanding HPA axis variability is key to interpreting its role in maternal and infant well-being.
• Further research is needed to reconcile inconsistent findings across diverse populations and methodologies.