According to the scientists, studying the length of your fingers, specifically your ring and index fingers, could help you determine your risk of more serious health complaints such as cancer and heart problems. For example, if your ring finger is longer than index finger, you could be twice as likely to develop osteoarthritis of the knee, researchers from Nottingham University found when they measured the fingers of 2,000 people with the condition.
Likewise, another study led by John Manning of Swansea University involving 200 students found those with a long ring finger suffered more colds and illnesses generally than those with longer index fingers. There were also more reported cases of chickenpox and German measles among this group.
The scientists claim that one's finger length is determined in the womb, by how much one's exposed to the sex hormones oestrogen and testosterone . Testosterone, the "male hormone" , encourages growth of the ring finger, and oestrogen , female hormone, fuels growth of index finger. Whether one's index or ring finger is longer is a signpost to you having more testosterone or oestrogen in one's body. And, exposure to these hormones early in life seems to influence risk of disease, say the scientists.