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FGR in the setting of preterm sterile intra-uterine milieu is associated with a decrease in RDS.

Chan-Wook Park1, Joong Shin Park1, Jong Kwan Jun1

  • 1Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.

Pediatric Pulmonology
|December 30, 2015
PubMed
Summary

Fetal growth restriction (FGR) in a sterile intrauterine environment is linked to reduced respiratory distress syndrome (RDS) in preterm infants. This suggests chronic hypoxic stress from FGR may aid fetal lung development.

Keywords:
amniotic fluidfetal growth restrictionplacentapreterm birthrespiratory distress syndrome

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Area of Science:

  • Neonatal Medicine
  • Perinatology
  • Pediatric Pulmonology

Background:

  • Respiratory distress syndrome (RDS) remains a significant cause of morbidity in preterm neonates.
  • The role of intrauterine conditions, such as fetal growth restriction (FGR), in modulating neonatal outcomes requires further investigation.
  • Sterile intra-uterine milieu, characterized by inflammation-free amniotic fluid and placenta, provides a unique setting to study FGR's impact.

Purpose of the Study:

  • To investigate the association between fetal growth restriction (FGR) and the incidence of respiratory distress syndrome (RDS) in preterm neonates born into a sterile intrauterine environment.
  • To determine if FGR independently predicts a decrease in RDS in this specific cohort.
  • To explore the potential benefits of chronic intrauterine hypoxic stress in fetal lung maturation.

Main Methods:

  • A cohort of 92 singleton preterm neonates (gestational age 24.5-33.4 weeks) born to mothers with a sterile intrauterine milieu was analyzed.
  • Fetal growth restriction (FGR) was defined as birth weight below the 5th percentile for gestational age.
  • Neonatal respiratory distress syndrome (RDS) incidence was compared between neonates with and without FGR, with adjustments for confounding variables using logistic regression.

Main Results:

  • Fetal growth restriction (FGR) was identified in 32% of the neonates, and 46% experienced RDS.
  • Neonates with FGR exhibited a significantly lower incidence of RDS (24% vs. 56%, P < 0.01).
  • Logistic regression confirmed FGR as a strong independent predictor of decreased RDS (OR = 0.049), outperforming advanced gestational age at delivery.

Conclusions:

  • Fetal growth restriction (FGR) in a sterile intrauterine setting is associated with a reduced incidence of respiratory distress syndrome (RDS) in preterm infants.
  • The findings suggest that chronic intrauterine hypoxic stress, a consequence of FGR, may promote fetal lung maturation.
  • This study highlights a potential protective effect of FGR on lung development in preterm neonates under specific sterile intrauterine conditions.