Your fingers reveal more about you than you might think, says a Norwegian study, which found that a comparison of your index and ring fingers suggest whether you are likely to be anxious or a good athlete.

Previous studies have shown that the amount of testosterone a fetus is exposed to influences their finger length — adults whose index finger is shorter than their ring finger were exposed to greater amounts of testosterone when they were in the womb.

Both women and men with this characteristic are generally better equipped to solve mentally demanding 3D rotation tasks as adults. They also tend to have better physical and athletic abilities, but are more prone to having ADHD and Tourette's syndrome.

"The relationship between the index finger and ring finger in particular indicates how much testosterone you have been exposed to in utero," says Carl Pintzka, a medical doctor and researcher at the National Competence Service for Functional MRI.

Pintzka says studies show that high levels of testosterone in utero show a link with an increased risk of developing diseases that are more common in men, such as ADHD, Tourette's, and autism.

Low levels of testosterone are associated with an increased risk of developing diseases that are more common in women, like anxiety and depression.

On the other hand, low levels of testosterone are associated with better abilities in verbal memory tasks, such as remembering lists of words.

The amount of testosterone a fetus is exposed to also likely affects the risk of developing various brain-related diseases.

The connection between finger length is also being explored by other researchers. A study released last year at Oxford University found that men with longer ring fingers are more likely to cheat on their partners, while those with index and ring fingers of the same length were more likely to be faithful.

But a study, which was conducted at McGill University in Canada, found that men whose ring fingers were longer than their index fingers were more likely to be kind than those who had longer index fingers.