Study Reveals Birth Order's Impact on Health Risks Later in Life
A recent study published in Nature Health has found significant associations between birth order and the risk of developing various health conditions. The research analyzed data from over 10 million individuals in two-child families, identifying links between birth order and 150 diseases. First-born children were found to have higher risks of neurodevelopmental challenges, immune-related allergies, and conditions like Tourette syndrome and OCD. In contrast, younger siblings showed a higher susceptibility to substance abuse and certain infectious diseases. The study suggests that physiological, immunological, and social mechanisms contribute to these differences. 
