Fetal growth and neurobehavioral outcomes in childhood

Area of Science:

• Pediatric Neurobehavioral Outcomes
• Developmental Psychology
• Maternal-Fetal Medicine

Background:

• Birth weight is associated with adult human capital.
• The fetal environment's role in neurodevelopment is not fully understood.
• Sibling pair studies can control for genetic and familial factors.

Purpose of the Study:

• To investigate the association between fetal growth rate and childhood neurobehavioral outcomes.
• To explore if fetal growth rate mediates the link between birth weight and later outcomes.
• To examine sex differences in these associations.

Main Methods:

• Utilized sibling pair data from a U.S. national survey.
• Employed mother fixed-effects models to isolate fetal growth effects.
• Assessed neurobehavioral outcomes via parent-reported developmental disabilities and behavior problems.

Main Results:

• A higher fetal growth rate was negatively associated with a lifetime diagnosis of developmental delay.
• Increased fetal growth rate showed a negative association with disruptive behaviors in male children.
• These findings highlight the fetal environment's influence on neurodevelopment.

Conclusions:

• Fetal growth rate is an important determinant of childhood neurobehavioral development.
• Developmental disabilities and behavioral issues may partially explain the birth weight-human capital link.
• Targeting fetal growth could potentially improve long-term developmental trajectories.