Down syndrome symptoms: Down syndrome is caused by an

Down syndrome is caused by an extra chromosome 21, affecting physical and intellectual development. Common physical traits of Down syndrome include a round face, upturned eyes, and a short build. Down syndrome increases the risk of developing complications and other health conditions. Down syndrome ... Down syndrome or Down 's syndrome , [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features. [1][13] Each person with Down syndrome is an individual. Problems with intellect and development are usually mild to moderate. Some people are healthy while others have serious health issues such as heart problems that are present at birth. Children and adults with Down syndrome have distinct face and body features. The symptoms of Down syndrome vary from person to person, and people with Down syndrome may have different problems at different times of their lives.