The Birth Order Conundrum: A Complex Web of Risk and Responsibility Research on birth order and disease risk has shed new light on the intricate relationships between family dynamics, genetics, and health outcomes.
A study analyzing data from over 10 million people in five million two child families found that first born children are more likely to develop neurological and mental health conditions such as autism, ADHD, Tourette syndrome, depression, and anxiety.
In contrast, second born children are more prone to substance abuse, digestive issues like gastritis, shingles, migraines, and some joint conditions.