Flu During Pregnancy: Experts Reveal Links to Autism Risks in Children

Experts are studying the link between maternal infections during pregnancy and the likelihood of autism in children. This research focuses on how specific infections, such as influenza, may play a role in this connection.

Autism, now understood as a spectrum of traits rather than a simple illness, has complex causes. Current research emphasizes a mix of genetic and environmental factors influencing its development.

Does having the flu during pregnancy lead to autism?

Dr. Ian Lipkin from Columbia University has found that pregnant women who experience fever, high levels of herpes simplex type 2 antibodies, or documented cases of influenza are more likely to have children diagnosed with autism spectrum disorder (ASD). His study, which relied on confirmed flu cases, suggested an increased risk of ASD when severe flu symptoms were present.

Dr. Lipkin noted that just as pregnant women are advised against alcohol and drugs, they should be cautious about infections that might harm fetal development.

If infections contribute to autism risks, it may be due to the mother’s immune response and subsequent inflammation, rather than the virus itself.

How might infections lead to autism?

To explore this, researchers have studied animal models, particularly mice. Dr. Irene Sanchez Martin’s research showed that immune activation during pregnancy in mice can lead to behavioral traits resembling autism in humans. While these findings do not directly correlate to human autism, they provide insights into how inflammation from infections can affect fetal development.

Dr. Sanchez Martin found that exposing pregnant mice to viruses resulted in early developmental deficits in embryos. These deficits appeared within 24 hours, predominantly affecting male embryos.

Importance of inflammation

Dr. Sanchez Martin emphasized that while results from mouse studies do not completely translate to humans, they highlight how disruptions in a fetus’s environment contribute to autism risk. Key factors include inflammation, rather than the specific infectious agent itself. Dr. Lipkin supported this view, noting that elevated inflammatory markers are commonly found in mothers of children diagnosed with autism.

In summary, inflammation during pregnancy may increase the risk of autism, highlighting the need for further research in this area.