This thesis assessed and characterised the motor performance of young people with a suspected high prevalence of Prenatal Alcohol Exposure (PAE) and Fetal Alcohol Spectrum Disorder (FASO) residing in a Western Australian youth detention centre. It explored the relationship between motor skills, FASO and PAE. The mean age of the young people was 16 years(n=99). Fifty percent of participants with FASO (n=36), and 30% of all young people assessed had a motor impairment. The high rates of motor skill difficulties in this population supports the need for screening, assessment, and intervention for adolescents with suspected FASO, and youth in detention.