Measure your index finger and then your ring finger. Put the length of your index over the length of your ring.  This is what doctors call your finger quotient.  A recent study has shown this number is related to your personality and can even put you at a greater risk of disease.

Research out of the University of Alberta in Canada has shown a ring finger significantly longer than the index points to higher prenatal testosterone levels, which means you have greater mental toughness and you’re more likely to be athletic

It’s all determined by your finger quotient: take the length of your index finger, and put it over the length of your ring finger.  If your finger quotient is less than one, it can point to more aggression, improved athletic ability, and a riskier personality.  A quotient greater than one can mean healthier knees, a higher risk of oral cancer, and a lower risk of prostate cancer.

Your finger quotient isn't a factor in diagnosing yet.  But researchers have found that the hormone imbalance in the womb responsible for your quotient can affect you for life.

Source:discovermagazine.com/2013/may/04-finger-length-ratio-can-predict-aggressive-behavior-and-risk-of-disease#.UkNK0T_4LoV