Large and in charge

A study by Ane Arregi-Otxotorena found that major behavioural problems are related to higher levels of cortisol in the hair, and maternal stress influences children's cortisol levels. Additionally, higher exposure to environmental noise is associated with lower cortisol levels in boys.

Research finds a correlation between dog behavioral traits and salivary hormone cortisol and neurotransmitter serotonin levels. Well-behaved dogs tend to have lower cortisol levels and higher serotonin levels, suggesting a link between canine temperament and physiological concentrations of hormones and neurotransmitters.

Women with prenatal depression may experience disrupted cortisol circadian rhythms, which could impact fetal development and pregnancy outcomes. Elevated nocturnal cortisol levels have been linked to higher rates of preterm birth and lower birth weight.

A new study suggests that higher hair cortisol levels are associated with worse attention and working memory performance, while higher salivary cortisol levels are linked to worse depressive symptom severity. The findings provide initial evidence on the correlation between HPA activation and cognitive decline during perimenopause.

A study by Washington State University researchers found a potential link between high maternal cortisol levels and unpredictable birth complications. Cortisol measurements in hair samples revealed elevated stress hormone levels among women who later experienced unexpected birth problems, such as early births or hemorrhaging.

A new study from Binghamton University found that couples who receive more negative social support tend to experience higher levels of cortisol, a hormone associated with stress reactions. In contrast, those who receive positive support exhibit lower cortisol levels and feel more understood, validated, and cared for by their partner.