👉 Trisomies, also known as trisomies and trisomies, are a group of genetic disorders that affect children in which all three chromosomes in each cell have an abnormal number of copies. This condition is often referred to as trisomy 21 or trisomy 21 with an extra chromosome (trisomies 21+). These conditions can cause developmental delays, intellectual disabilities, and other health issues. Trisomies 21+
