Genetic and environmental factors are believed to be involved in most cases when the baby is born with congenital heart disease. It is caused by abnormal formation of the heart during fetal development. Now the Nation Health Commission said that in 24 provincial regions in China the newborns will be screened for congenital heart disease to provide early treatment. According to womanofchina.cn the commission also said that the screening will be provided to children between 6 and 72 hours after birth and in some places free of charge. In the UK congenital heart disease is the most common birth defect