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Updated: Apr 28, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Immobility reaction at birth in newborn infant
Pierre Victor Rousseau1, Jacques Francotte2, Maria Fabbricatore2
1Department of Family Sciences, University of Mons, Belgium; Department of Obstetrics, Tivoli University Hospital, La Louviere, Belgium.
A newly identified immobility reaction (IR) in newborns, characterized by frozen features and shallow breathing, may be linked to maternal prenatal stress. This finding could impact neonatal care and warrants further investigation into infant stress responses.
Area of Science:
- Neonatal Medicine
- Perinatal Psychology
Background:
- A novel immobility reaction (IR) in human newborns at or immediately after birth is described.
- This reaction presents with distinct physiological and behavioral characteristics.
Purpose of the Study:
- To document and characterize a previously unreported immobility reaction (IR) in newborns.
- To investigate potential perinatal factors associated with the observed IR.
Main Methods:
- Analysis of 31 video recordings of normal term vaginal deliveries.
- Observation of infant behavior from the moment of birth (defined as between thorax and pelvis delivery).
- Statistical analysis to identify correlations between maternal prenatal stress (PS) and infant IR.
Main Results:
- Immobility reaction (IR) observed in 8 out of 31 newborns.
- Key features of IR included immobilization, a frozen facial expression, shallow breathing, and bradycardia.
- Maternal prenatal stress (PS) showed a significant relationship with IR (p=.037).
Conclusions:
- The observed IR shares characteristics with severe stress responses, suggesting a potential link to prenatal stress.
- Infants exhibiting IR may be at risk for stress-related disorders.
- Further research is recommended to explore the connection between maternal stress, IR, and potential long-term health outcomes, including sudden infant death syndrome (SIDS).
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