Cerebral palsy (CP) is a clinical syndrome characterized by a persistent disorder of posture or movement caused by a non-progressive disorder of the immature brain. The prevalence of CP has been reported to be between 1.86 cases per 1,000 population in the United Kingdom and 3.6 cases per 1,000 in 8-year-old children in the United States, with little variation among Western nations. In a very recent systematic review analyzing a total of 49 studies, the pooled overall prevalence of CP was 2.11 cases per 1,000 live births. Rates of CP in population-based settings in India and China gave figures of 2-2.8 cases per 1,000 births. A systematic literature review for a period spanning between 1965 and 2004 found CP more prevalent in more deprived socio-economic populations. The same study identified low birthweight, intrauterine infections and multiple gestation as the most important risk factors for CP.