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Maternal Fatty Acid Status During Pregnancy and Child Autistic Traits: The Generation R Study
Insights
Maternal intake of omega-3 and omega-6 fatty acids during pregnancy influences autistic traits in children. A lower omega-3 to omega-6 ratio was linked to increased autistic traits, primarily due to higher omega-6 levels.
Area of Science:
- Neuroscience
- Nutritional Science
- Developmental Pediatrics
Background:
- Polyunsaturated fatty acids, specifically omega-3 and omega-6, are crucial for brain development and function.
- Maternal nutrition during pregnancy plays a significant role in fetal neurodevelopment.
- The balance of omega-3 and omega-6 fatty acids may impact the risk of neurodevelopmental disorders.
Purpose of the Study:
- To investigate the association between maternal plasma polyunsaturated fatty acid status during pregnancy and the risk of autistic traits in offspring.
- To determine if the ratio of omega-3 to omega-6 fatty acids or the status of individual fatty acids influences autistic traits.
- To explore potential biological pathways linking maternal fatty acid intake to autistic traits.
Main Methods:
- The study analyzed data from the Generation R cohort, including maternal plasma fatty acid concentrations and the omega-3:omega-6 ratio in mid-pregnancy.
- Autistic traits in 4,624 children at age 6 were assessed using the Social Responsiveness Scale short form.
- Statistical analyses were performed to examine associations, controlling for child intelligence.
Main Results:
- A lower maternal omega-3 to omega-6 ratio during pregnancy was associated with increased autistic traits in children.
- Higher maternal levels of total omega-6 and linoleic acid were specifically linked to more autistic traits.
- Maternal omega-3 status and fish intake were not significantly associated with autistic traits in offspring.
Conclusions:
- The findings suggest that a lower prenatal omega-3:omega-6 ratio, driven by higher omega-6 status, is associated with a greater risk of autistic traits.
- These results indicate a potential biological pathway involving maternal fatty acid distribution during pregnancy affecting offspring autistic traits.
- The observed associations were independent of child intelligence, highlighting a specific effect on autistic trait development.
Abstract:
ω-3 and ω-6 polyunsaturated fatty acids are important for brain function and development. We examined whether maternal polyunsaturated fatty acid status during pregnancy affects risk of autistic traits in childhood. Within the Generation R cohort, we measured maternal plasma polyunsaturated fatty acid concentrations and the ω-3:ω-6 ratio in midpregnancy (Rotterdam, the Netherlands, 2001-2005). Child autistic traits at 6 years were assessed by using the Social Responsiveness Scale short form in 4,624 children. A lower maternal ω-3:ω-6 ratio during pregnancy was associated with more autistic traits in the offspring (β = -0.008, 95% confidence interval: -0.016, -0.001). In particular, a higher total ω-6 and linoleic acid status were associated with more autistic traits (all P's < 0.05). Associations were independent of child intelligence, suggesting that the fatty acid distribution specifically affects the development of autistic traits in addition to general neurodevelopment. Maternal plasma ω-3 status was not associated with child autistic traits and, consistently, neither was prenatal dietary fish intake. Our study shows that a lower prenatal ω-3:ω-6 ratio is associated with more child autistic traits, which is largely accounted for by higher ω-6 instead of lower ω-3 status. These results suggest a biological pathway between maternal fatty acid intake during pregnancy and autistic traits in the offspring.
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