Paradoxical diurnal cortisol changes in neonates suggesting preservation of foetal adrenal rhythms

Paradoxical diurnal cortisol changes in neonates suggesting preservation of foetal adrenal rhythms

Studies suggested the presence of foetal adrenal rhythms of cortisol, which are entrained in antiphase to maternal rhythms. In contrast, neonates are thought to have no adrenal rhythm until 2-3 months after birth. To test the hypothesis that a foetal-type adrenal rhythm is preserved after birth, saliva samples were collected from 65 preterm/term infants during hospital stay (30-40 weeks correct...

Racial/ethnic differences in cortisol diurnal rhythms in a community sample of adolescents.

PURPOSE To identify potential physiological pathways to racial disparities in health outcomes, this study uses cortisol data collected from a community sample of 255 adolescents to examine whether there are racial/ethnic differences in cortisol slopes and levels across the waking day in naturalistic settings. METHODS This study uses salivary cortisol data (sampled five times per day over 3 da...

Diurnal cortisol rhythms, fatigue and psychosocial factors in five-year survivors of ovarian cancer.

Fatigue is a challenge in ovarian cancer survivorship and greatly impacts quality of life. In other cancer populations, fatigue has been associated with abnormal diurnal cortisol patterns. However, little is known about biological and behavioral factors in 5+-year ovarian cancer survivors and potential mechanisms underlying persistent fatigue have not been investigated in this population. Moreo...

Foetal adrenal hyperplasia.

Racial and ethnic differences in diurnal cortisol rhythms: are they consistent over time?

BACKGROUND Prior research indicates that blacks and Hispanics/Latinos have flatter diurnal cortisol declines across the day, a profile associated with poorer health. The stability of racial and ethnic differences in cortisol levels over time is not well understood, and additional research is needed to establish racial and ethnic differences in psychosocial stress levels as related to changes in...