How often does Down Syndrome occur?
Down syndrome is the most commonly occurring genetic condition. One in every 800-1,000 live births is a child with Down syndrome, representing approximately 5,000 births per year in the United States alone. Today, Down syndrome affects more than 350,000 people in the United States. Eighty percent of children born with Down syndrome are born to women younger than 35 years old. However, as a woman ages, her chance of conceiving a child with Down syndrome becomes greater.
