People with antisocial personality disorder, amphetamine use disorder or both showed statistically significantly lower index-finger-to-ring-finger-ratio (a shorter index finger, compared to a longer ring finger), which is associated with higher testosterone and lower estrogen exposure in the womb.

People with antisocial personality disorder, amphetamine use disorder or both showed statistically significantly lower index-finger-to-ring-finger-ratio (a shorter index finger, compared to a longer ring finger), which is associated with higher testosterone and lower estrogen exposure in the womb.