World Down Syndrome Day
March 21, 2024Advertisement
About one in 800 babies are born with Down syndrome, or Trisomy 21, a condition that means they have an extra chromosome, which often causes various intellectual and physical disabilities, as well as other medical issues. March 21, or the 21st day of the third month of the year, was selected as the date of World Down Syndrome Day to signify the trisomy, or tripling, of the 21st chromosome.