According to the BBC, testosterone levels in the womb affect finger length. Low testosterone levels are linked to shorter ring fingers. The relative lengths of ring fingers and index fingers can indicate levels of some cognitive traits, sexual orientation, and signal susceptibility to some diseases.
Women with male-like, longer ring fingers do better in spatial ability tests. (to hormones'” href=”http://news.bbc.co.uk/2/hi/health/4202199.stm” target=”_blank”>link)
Financial traders whose ring fingers are longer than their index fingers make the most money. (to earning power” href=”http://news.bbc.co.uk/2/hi/health/7825890.stm” target=”_blank”>link)
Boys with ring fingers shorter than their index fingers have a greater risk of heart attack. (link)
Men with index fingers that are longer than their ring fingers are significantly less likely to develop prostate cancer. (link)
Children with shorter ring fingers do better at reading tests than math tests. (to exam success'” href=”http://news.bbc.co.uk/2/hi/uk_news/education/6680737.stm” target=”_blank”>link)
Men with shorter index fingers are likely to be more “boisterous.” (to aggression'” href=”http://news.bbc.co.uk/2/hi/health/4314209.stm” target=”_blank”>link)
Women with shorter index fingers are more likely to be lesbians. (link)