Effects of intrauterine growth retardation and its subtypes on the development of the preterm infant

Area of Science:

• Neonatal neurology
• Developmental pediatrics
• Perinatal medicine

Background:

• Intrauterine growth retardation (IUGR) affects fetal growth, potentially impacting long-term neurodevelopment.
• Preterm infants are at increased risk for developmental issues, with IUGR potentially exacerbating these risks.

Purpose of the Study:

• To investigate the neurological development of preterm infants with asymmetric (A-SGA) and symmetric (S-SGA) IUGR.
• To compare developmental outcomes between SGA preterm infants, appropriate for gestational age (AGA) preterm infants, and full-term AGA infants.

Main Methods:

• Prospective study comparing four groups: A-SGA preterm (n=26), S-SGA preterm (n=27), AGA preterm (n=131), and full-term AGA (n=121).
• Neurological development assessed at 18 months corrected age using the modified Denver Developmental Screening Test.
• Evaluated domains included fine and gross motor skills, visuo-auditory perception, speech, and social abilities.

Main Results:

• Both A-SGA and S-SGA preterm groups showed higher rates of neurological abnormalities compared to controls.
• A-SGA infants had lower visuo-auditory and social scores; S-SGA infants showed deficits across all domains except visuo-auditory perception.
• IUGR and infant sex were significant predictors of slower neurological development.

Conclusions:

• Preterm infants experiencing IUGR, especially the symmetric form, have a significantly increased likelihood of delayed neurological development.
• These findings highlight the importance of monitoring neurodevelopmental trajectories in preterm infants with IUGR.