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  • Eating fish but not...

Eating fish but not omega-3 supplements during pregnancy may lower likelihood of autism diagnosis, study finds

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2024-09-10T20:15:52+05:30  |  Updated On 11 Sept 2024 12:57 PM IST
Vitamin D during pregnancy
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Eating any amount of fish during pregnancy was associated with about a 20% lower likelihood of autism spectrum disorder (ASD) diagnosis, particularly in females, and a slight reduction in autism-related traits in offspring, according to a new study funded by the Environmental influences on Child Health Outcomes (ECHO) Program at the National Institutes of Health.

However, researchers did not find the same association with supplements containing omega-3 fatty acids.

Fish is an important source of omega-3 fatty acids, an essential nutrient during pregnancy for supporting maternal health and child neurodevelopment. A recent analysis of ECHO Cohort data revealed that about 25% of the pregnant participants reported never eating fish or consuming it less than once a month during their pregnancy. Even fewer participants reported taking omega-3 fish oil supplements.

ECHO Cohort researchers wanted to see whether low fish consumption and omega-3 supplement use during pregnancy might be associated with the occurrence of an autism diagnosis or parent-reported autism-related traits.

“Our study contributes to a growing body of evidence that demonstrates the role that prenatal diet can play in autism-related outcomes in offspring,” said ECHO Cohort researcher Emily Oken, MD, MPH, of Harvard Medical School.

Dr. Oken said the findings underscored the need for better public health messaging about guidelines for fish consumption for pregnant people, considering the low fish intake in the U.S. and the rising diagnoses of autism.

What happened during the study?

Researchers analyzed data from about 4,000 participants, examining the relationships among fish intake, supplement use, and neurodevelopmental outcomes related to autism.

Fish consumption and omega-3 supplement use were measured with dietary information reported by participants. Participants’ fish consumption was categorized as less than once a month, more than once a month but less than weekly, weekly, and two or more servings per week. About 20% of adult participants reported no fish intake, and most reported not using omega-3 or fish oil supplements.

The researchers then looked at the relationship between maternal fish intake and omega-3 fish oil supplement use during pregnancy and the occurrence of clinician-diagnosed autism and parent-reported autism-related traits. These traits were measured using the Social Responsiveness Scale (SRS), a widely used survey completed by parents or caregivers. Higher scores on the SRS indicate the presence of more autism-related behaviors.

Consuming fish during pregnancy was associated with a lower likelihood of offspring being diagnosed with autism and a slight decrease in total SRS scores compared to not eating fish. These results were consistent across all levels of fish consumption, from "any" amount or "less than once per week" to "more than twice per week." No significant associations were found between omega-3 fish oil supplements and autism diagnosis compared to no use.

Experts recommend that people consume additional omega-3 fatty acids during pregnancy. Prenatal fish intake is a key source of omega-3 fatty acids that are critical for fetal brain development. However, fish and omega-3 fatty acid supplementation in the U.S. is low.

“This study provides yet more evidence for the safety and benefit of regular fish consumption during pregnancy,” said Dr. Oken. “Other proven benefits include lower risk for preterm birth and improved cognitive development.”

Reference:

Kristen Lyall, Matt Westlake, Rashelle J Musci, Kennedy Gachigi, Emily S Barrett, Theresa M Bastain, Nicole R Bush, Claudia Buss, Carlos A Camargo, Lisa A Croen, Dana Dabelea, Anne L Dunlop, Amy J Elliott, Assiamira Ferrara, Akhgar Ghassabian, James E Gern, Marion E Hare, Irva Hertz-Picciotto, Alison E Hipwell, Christine W Hockett, Margaret R Karagas, Claudia Lugo-Candelas, Thomas G O’Connor, Rebecca J Schmidt, Joseph B Stanford, Jennifer K Straughen, Coral L Shuster, Association of maternal fish consumption and ω-3 supplement use during pregnancy with child autism-related outcomes: results from a cohort consortium analysis, The American Journal of Clinical Nutrition, https://doi.org/10.1016/j.ajcnut.2024.06.013.

American Journal of Clinical Nutritionpregnancyfishomega 3autism spectrum disorder
Source : American Journal of Clinical Nutrition
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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