Sibling dynamics and health risks

A comprehensive study has revealed that birth order within a family is linked to certain long-term health risks. The findings showed that the first-born child is more likely to be diagnosed with neurodevelopmental and psychological disorders such as autism and ADHD, while the second-born is more susceptible to migraines, shingles, gastrointestinal issues, and substance abuse disorders. Although the study was extensive, analyzing data from 10 million individuals over two decades, the researchers emphasized that the results do not establish direct causation, as other factors like parental age and spacing between siblings may also play a role.

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