What causes the variation in finger lengths among individuals, with some having longer index fingers while others have longer ring fingers or fingers of equal length?

What insights can the length of your fingers offer about your personality, cognitive abilities, and long-term health? And how do androgens factor into this?

Your fingers can tell you a lot about your personality. What kind of fingers  do you have? | Panorama | Ammon News

According to neuroscientists, the explanation lies in a combination of genetic factors and hormonal influences during prenatal development. Here’s their take: