Mental Retardation or Intellectual Disability is a condition that is usually diagnosed in infancy. Those with milder symptoms may go undiagnosed until it is noticed that they are not reaching the necessary milestones.

Mental Retardation is when an individual is below average intelligence. This is due to their brain not developing properly, or functioning correctly. They have a lack of skills that are necessary and essential for daily living. Symptoms can vary with each individual and can range from mild to severe. If the symptoms are severe then normally the infantile state will persist for life

Individuals who are diagnosed with this can display other behavioural traits including aggression, self harm, low tolerance, frustration, and low self-esteem. Some may also display difficult mood temperaments associated with psychotic disorders. Others can be the opposite, pleasant and calm. Physically some may be shorter in stature and facial elements can set them apart from the norm.

The causes of mental retardation are many, and it is often unexplained in many cases. Trauma such as lack of oxygen before, during or after birth, infection (for example meningitis), chromosome abnormalities and nutritional deficits such as severe malnutrition are explanations in some cases.

Those with milder systems of Mental Retardation, with good educational and family support, can go onto live independent lives.