90% of people abort there children because of there sickness. This sickness runs through your brain which makes the people slow. 1 out of every 619 live births.... currently , more than 400,000 are living with down syndrome in the united. The cause down syndrome was discovered rather recently in 1959.People with down syndrome have an increased risk from certain medicals. I have chosen down syndrome because i love people with down syndrome there really nice so i could tell people about they seem happier then other people there just adorable i had seen this girl with her mother in disneyland and rides did not affect her for nothing she was really happy. Girls with down syndrome are gorgeous in every way no matter how they look. 400,000 people are living with it.