A new study suggests that a mother’s occupation, even years before pregnancy, may be linked to a higher risk of autism in children. High-risk jobs expose women to harmful chemicals and intense stress, and these factors may influence fetal brain development.
A study analyzed data from 1,702 children diagnosed with autism and compared them with more than 1,108 children without the condition. The findings show that mothers in occupations with higher environmental or psychological risks were more likely to have children with autism.
The study highlights a strong link between certain jobs and increased risk. Military and defense roles show the highest association, with a 59% increase in autism risk compared to lower-risk occupations.
Many of these jobs expose workers to harmful substances such as vehicle exhaust, fuel emissions, and industrial chemicals. Diesel fumes release tiny particles that can enter the body and cause inflammation, which may disrupt early brain development.
The study also highlights the impact of work-related stress. Public administration and legal professions often place workers under heavy psychological pressure. Stress during pregnancy can change hormone levels and blood flow, which may affect fetal brain growth.
The findings do not prove that these jobs directly cause autism. Instead, they suggest that environmental exposure and long-term stress can combine with other factors to increase risk.
The study calls for more research to better understand how workplace conditions influence pregnancy outcomes. It also urges stronger protections for women in workplaces where toxic exposure or chronic stress is common.
Overall, the study adds to growing evidence that both environmental and lifestyle factors before and during pregnancy play an important role in shaping maternal health outcomes and fetal developments.