How is ID diagnosed?

Long process, requires input from different health professionals - Family History e.g. some chromosomal micro-deletions can occur in family members e.g., 15q11.2 microdeletion Alcohol, drug misuse/abuse e.g. Fetal alcohol syndrome [FAS] (common cause of ID Detailed history e.g. seizure disorders, attentional difficulties, sleep disturbances, behavioral disorders MRI/CT IQ test