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Maternal anxiety and infants' hippocampal development: timing matters

A Qiu1, A Rifkin-Graboi, H Chen

  • 11] Department of Bioengineering, National University of Singapore, Singapore [2] Clinical Imaging Research Centre, National University of Singapore, Singapore [3] Singapore Institute for Clinical Sciences, the Agency for Science, Technology and Research, Singapore.

Translational Psychiatry
|September 26, 2013
PubMed

Insights

Maternal anxiety during pregnancy slows infant hippocampal growth. Postnatal anxiety affects left and right hippocampus development differently, impacting stress regulation structures. This research clarifies the timing of these critical influences.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Maternal Health

Background:

  • Maternal anxiety is linked to offspring brain development.
  • The precise timing of maternal anxiety's influence on infant brain development is not well understood.
  • The hippocampus, crucial for stress regulation, is a key area of interest.

Purpose of the Study:

  • To investigate the effects of antenatal (prenatal) and postnatal maternal anxiety on early infant hippocampal development.
  • To determine the timing of maternal anxiety's impact on the developing hippocampus.

Main Methods:

  • Magnetic resonance imaging (MRI) was used to assess hippocampal volume in 175 neonates at birth and 35 at 6 months.
  • Maternal anxiety was measured using the State-Trait Anxiety Inventory (STAI) during pregnancy and postpartum.
  • Regression analyses were performed to correlate maternal anxiety levels with hippocampal growth.

Main Results:

  • Antenatal maternal anxiety did not affect hippocampal volume at birth but was associated with slower hippocampal growth in the first 6 months.
  • Postnatal maternal anxiety showed a positive association with right hippocampal growth and a negative association with left hippocampal volume at 6 months.
  • The study found distinct effects of antenatal and postnatal maternal anxiety on the growth of the left and right hippocampi.

Conclusions:

  • Antenatal maternal anxiety negatively impacts early hippocampal growth.
  • Postnatal maternal anxiety differentially affects the growth of the left and right hippocampi.
  • These findings highlight the critical timing of maternal anxiety's influence on infant brain structures involved in stress regulation.

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