Background The possible causes of greater depression among adolescent girls were
investigated by examining variation in the influence of genetic and environmental risk factors
among 182 prepubertal female, 237 prepubertal male, 314 pubertal female, and 171
pubertal male twin pairs from the Virginia Twin Study of Adolescent Behavioral
Development. Objectives To compare the trajectory of depressive symptoms among boys
and girls from childhood to adolescence; to analyze the role of genetic, shared, and unique …