How can Down syndrome effect your health?

Every cell affected. Down syndrome is caused by having an extra copy of chromosome 21. Typically, this is caused by having three full copies of chromosome 21, also known as trisomy 21. Every cell in the body has an abnormal number of chromosomes, so it's easy to imagine that multiple organ systems would be affected. A valuable resource for down syndrome health supervision is available from the aap. www.aap.org.