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Fetal response to induced maternal stress
Janet A DiPietro1, Kathleen A Costigan, Edith D Gurewitsch
1Department of Population and Family Health Sciences, Johns Hopkins University, 624 N. Broadway, Baltimore, MD 21205, USA. jdipietr@jhsph.edu
Early Human Development
|October 29, 2003
Summary
The fetus responds to maternal stress, with this response changing and becoming more pronounced throughout gestation. Individual fetal and maternal stress responses show stability, suggesting in-utero development of characteristic patterns.
Area of Science:
- Neuroscience
- Developmental Psychology
- Maternal-Fetal Medicine
Background:
- Limited understanding of intrauterine fetal responses to maternal psychological stress.
- Growing evidence links antenatal stress to postnatal development.
Purpose of the Study:
- Investigate fetal responses to maternal stress.
- Examine changes in fetal response across gestation.
- Assess the stability of maternal and fetal response patterns over time.
Main Methods:
- 137 low-risk pregnant women underwent induced maternal stress (Stroop task) at 24 and 36 weeks gestation.
- Maternal physiological measures (heart rate, skin conductance) and fetal responses (heart rate, heart rate variability, motor activity) were recorded.
- Analysis focused on maternal sympathetic activation and fetal reactivity and recovery.
Main Results:
- Maternal sympathetic activation occurred, decreasing in magnitude from 24 to 36 weeks.
- Fetuses exhibited increased heart rate variability and suppressed motor activity in response to stress.
- The magnitude of fetal responses increased with advancing gestation.
- Maternal and fetal response patterns demonstrated stability over time.
Conclusions:
- Fetuses respond to maternal stress, indicating that intrauterine neurobehavioral regulation can be affected by maternal environmental factors.
- Individual response patterns emerge in utero, suggesting early autonomic development is influenced by these interactions.
- No protective effect of diminished maternal stress sensitivity was observed for the fetus.