Story thread · 3 reports / 3 sources
Birth order linked to 150 health conditions in study of 10 million American siblings
foxnews.com · 18h · first report
How the coverage leans
Across 3 sources · syndicated copies counted once
First-born children showed higher rates of autism, ADHD and food allergies, while second-born siblings faced more substance use disorders and migraines.
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