An assessment of hair cortisol among postpartum Brazilian mothers and infants from a high‐risk community in São Paulo: Intra‐individual stability and association in mother–infant dyads

This study examined maternal–infant synchrony of hair cortisol at 12 months after birth and the intra‐individual stability of maternal hair cortisol in the postpartum period. Participants were selected from an ongoing São Paulo birth cohort project, where families are considered to be “high‐risk” du...

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Bibliographic Details
Published in:Developmental psychobiology 2017-11, Vol.59 (7), p.916-926
Main Authors: Liu, Cindy H., Fink, Günther, Brentani, Helena, Brentani, Alexandra
Format: Article
Language:English
Subjects:
Adolescent
Adult
Brazil
Female
Hair - chemistry
hair cortisol
high‐risk
Humans
Hydrocortisone - metabolism
Infant
Male
Mother-Child Relations
Mothers
postpartum
Postpartum Period - metabolism
Poverty
Poverty Areas
Risk
stress
Stress, Psychological - metabolism
Young Adult
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Summary:This study examined maternal–infant synchrony of hair cortisol at 12 months after birth and the intra‐individual stability of maternal hair cortisol in the postpartum period. Participants were selected from an ongoing São Paulo birth cohort project, where families are considered to be “high‐risk” due to their chronic stress experiences, with the majority living in slums (favelas). Cortisol was collected through 3‐cm segments of hair samples, with values representing approximate levels of cortisol from 9 to 12 months for mothers and children and 6 to 12 months for mothers. Maternal and infant cortisol values reflecting chronic stress 9–12 months after birth were highly correlated (r = .61, p 
ISSN:0012-1630
1098-2302
DOI:10.1002/dev.21557