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Related Experiment Video

Updated: Jan 6, 2026

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
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Histologic Chorioamnionitis and Neurodevelopment in Preterm Infants.

Laura S Peterson1,2, Shalini Roy1,2, Viral G Jain3

  • 1Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.

JAMA Network Open
|September 9, 2025
PubMed
Summary
This summary is machine-generated.

Histologic chorioamnionitis (HCA) is linked to poorer motor skills in preterm infants, independent of early birth. This inflammation directly impacts neurodevelopment, suggesting a need for targeted therapies.

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Area of Science:

  • Neonatal Health
  • Neurodevelopmental Pediatrics
  • Obstetrics and Gynecology

Background:

  • Chorioamnionitis increases risks for preterm birth and potential neurodevelopmental impairments.
  • Evidence linking inflammation from chorioamnionitis to neurodevelopmental issues is inconsistent.
  • Histologic chorioamnionitis (HCA) may directly affect fetal neurodevelopment beyond prematurity.

Purpose of the Study:

  • To determine if moderate to severe HCA is directly associated with adverse motor performance in preterm infants.
  • To assess the independent effect of HCA on motor skills, excluding indirect effects of premature birth.
  • To investigate the mediating role of premature birth in the HCA-neurodevelopmental outcome relationship.

Main Methods:

  • Prospective, population-based cohort study of preterm infants (gestational age ≤32 weeks).
  • Compared motor, cognitive, and language scores (Bayley Scales of Infant and Toddler Development, Third Edition) between infants with moderate to severe HCA and those with no/mild HCA.
  • Utilized multivariable regression and causal mediation analysis to assess direct and indirect associations.

Main Results:

  • Moderate to severe HCA was independently associated with lower motor, cognitive, and language scores at 22-26 months corrected age.
  • Infants with HCA were born significantly earlier (median 2.6 weeks) than controls.
  • Causal mediation analysis indicated that 75% of the motor deficit was a direct effect of HCA, with 25% mediated by earlier preterm birth.

Conclusions:

  • Moderate to severe HCA is directly linked to adverse motor neurodevelopment in preterm infants.
  • HCA impacts neurodevelopment both by inducing earlier preterm birth and through direct inflammatory effects.
  • Findings support clinical counseling and targeted anti-inflammatory interventions for high-risk pregnancies.