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Published on: July 11, 2025
Prenatal and birth complications in autism
M Brimacombe1, X Ming, M Lamendola
1Department of Preventive Medicine, New Jersey Medical School - UMDNJ, Newark, NJ, USA. brimacmb@umdnj.edu
Insights
Prenatal and birth complications may increase autism risk. This study found higher rates of certain prenatal factors in families of autistic children, suggesting a link to autism onset.
Area of Science:
- Neurodevelopmental Disorders
- Pediatric Health
- Genetics and Epigenetics
Background:
- Autism Spectrum Disorder (ASD) is a complex neurodevelopmental condition.
- Identifying early risk factors is crucial for understanding ASD etiology.
- Prenatal and birth histories are investigated for potential associations with ASD onset.
Purpose of the Study:
- To examine prenatal and birth history as potential risk factors for autism.
- To investigate the prevalence of specific prenatal and birth complications in a cohort of autistic children.
Main Methods:
- A cohort study of 164 families with autistic children was conducted.
- Prenatal and birth history information was collected at intake.
- Clinical review of obtained historical data was performed.
Main Results:
- Higher prevalence rates of vaginal bleeding, prolonged labor, and prematurity were observed in the cohort.
- Clustering of multiple prenatal risk factors was identified.
- This clustering correlated with maternal age but not birth order.
Conclusions:
- Findings support the hypothesis that prenatal systemic issues represent a distinct risk dimension for autism.
- Prenatal complications may play a significant role in the developmental trajectory leading to autism.
Objectives:
Prenatal and birth history as potential sources of risk factors in relation to the onset of autism were examined.
Methods:
A cohort of 164 families of autistic children referred to The Autism Center at New Jersey Medical School-UMDNJ, Newark, New Jersey, over a two-year period was studied. Intake prenatal and birth history information was obtained from each family and reviewed by a clinician.
Results:
Prevalence rates in this cohort for vaginal bleeding, prolonged labor and prematurity were higher than comparable rates reported nationally and in New Jersey. Clustering of multiple prenatal risk factors was observed. This clustering was associated with the age of the mother, but uncorrelated with birth order.
Conclusions:
These findings support the general hypothesis that systemic problems at the prenatal stage may form a distinct dimension of risk associated with autism.
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