Brewster, Melissa; Conradt, Elisabeth. (University of Utah)
Faculty Advisor: Conradt, Elisabeth (University of Utah, Psychology)
Stress exposure in the early years of life is a public health concern since this exposure can lead to a variety of illnesses ranging from diabetes to depression. More specifically, previous research has emphasized the importance of understanding the impact of stress exposure on an infant. However, there is limited research linking in utero stress exposure to later infant development, more specifically, on newborn self-regulation and neurobehavior. We examined whether newborn neurobehavior was associated with prenatal maternal psychophysiological signs of stress. Pregnant women (N=162) during their third trimester were invited to the child adaptation and neurodevelopment (CAN) laboratory to acquire hair cortisol concentrations, baseline heart rate (HR), baseline respiratory sinus arrhythmia (RSA), and baseline electrodermal activity (EDA) parameters: skin conductance response (SCR) and skin conductance levels (SCL). Subsequent to this visit was the hospital visit. We assessed newborns between twenty-four hours and two months of age using the NICU Network Neurobehavioral Scale (NNNS) which measures the dimensions of attention and arousal. We conducted correlations and ordinary least squares regression analyses. Maternal hair cortisol levels were not significantly associated with newborn attention (r= -.026, p=.77) and arousal (r= -.077, p= .382). However, exploratory analyses demonstrated that hair hygiene may affect these results. Baseline HR was not associated with attention (r= .012, p=.879) and arousal (r= -.002, p=.979). Baseline RSA was also not associated with attention (r= -.106, p=.192) and arousal (r= .071, p= .381). Lastly, baseline SCR and SCL were not associated to newborn attention (r=-.094, p=.247; r=-.013, p=.874) and arousal (r=-.077, p=.342; r=-.12, p=.138), respectively. These results suggest that having naturally high or low psychophysiological measurements has little-to-no impact on infant well-being, as opposed to stress reactivity.