The length of a person's finger could indicate their risk of developing motor neurone disease, according to new research.
UK researchers analysed the finger length of 110 people, 47 of whom had the most common form of motor neurone disease - amyotrophic lateral sclerosis (ALS).
The results, obtained by the BBC, revealed that those who had a longer fourth finger compared to their index finger were more likely to have ALS.
Previous research has revealed that finger length is partly determined by how much testosterone a baby is subjected to before birth.
Dr Brian Dickie of the Motor Neurone Disease Association, told the news provider:
"It's important to remember that exposure to higher testosterone in the womb does not directly cause motor neuron disease.
"Many people with long ring fingers will never develop motor neuron disease as we believe there are numerous genetic and environmental factors that need to coincide in order to trigger the disease."
The findings were published in the Journal of Neurology, Neurosurgery and Psychiatry.