The 2nd to 4th digit ratios (2D:4D) in patients with bipolar disorder - Tegin C, Canan F, El-Mallakh RS.

BACKGROUND: The ratio of the index finger to the ring finger (2D:4D) is a reflection of the intrauterine hormonal environment and a lower ratio has been shown to be associated with male gender, impulsive behaviors, substance abuse, and aggression. Bipolar ...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Alcohol and Other Drugs Source Type: news