Down syndrome is a genetic disorder caused by the presence of an extra chromosome 21. It is associated with mild to moderate intellectual disabilities and developmental delays. Common physical characteristics include a flattened face, upward slanting eyes, and short fingers. Individuals with Down syndrome also often have heart defects, gastrointestinal issues, hearing loss, and early-onset Alzheimer's disease. Screening and diagnostic tests during pregnancy can indicate risk or confirm a diagnosis, but the condition is usually diagnosed after birth through chromosome analysis.
Down syndrome is a genetic disorder caused by the presence of an extra chromosome 21. It is associated with mild to moderate intellectual disabilities and developmental delays. Common physical characteristics include a flattened face, upward slanting eyes, and short fingers. Individuals with Down syndrome also often have heart defects, gastrointestinal issues, hearing loss, and early-onset Alzheimer's disease. Screening and diagnostic tests during pregnancy can indicate risk or confirm a diagnosis, but the condition is usually diagnosed after birth through chromosome analysis.