Men typically have longer ring fingers than index fingers due to an increased exposure to testosterone while in the embryonic phase of development. The reverse is true for women, who typically have longer index fingers than ring fingers as a result of higher exposure to estrogen.
Researches find that finger length has a correlation with sports ability, musicality, sperm count and even sexual orientation. Men and women who demonstrate the opposite finger length inclination have statistically shown more incidences of depression, autism, heart disease and breast cancer. Long ring fingers in men were linked in ancient Roman times to fertility and power.