If you grew up with siblings, you might have noticed your family either adhering to or defying birth order tropes – think “the responsible eldest daughter” or “the invisible middle child”.
As it turns out, scientists reckon birth order might actually affect your health, wealth, and even IQ.
Here’s what the research says:
How does birth order affect wealth, IQ, health, and more?
Some data suggest that first-borns are 13% less likely to smoke than fifth-borns, while first-borns are “more likely to be overweight, to be obese, and to have high blood pressure and high triglycerides”.
Meanwhile, first-borns seem likelier to have AD...


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