Trisomies Detected by NIPT

Trisomy 21 (Down’s Syndrome)

  • Down’s Syndrome is a genetic condition caused by the presence of three copies of chromosome 21 (instead of the usual two copies)
  • Down’s Syndrome is the most common chromosomal disorder at birth
  • For every 1,000 births there will be one baby born with Down’s Syndrome
  • The incidence of Down’s Syndrome increases with increasing maternal age
  • People with Down’s Syndrome have learning difficulties and can also have other medical conditions including heart defects, hearing impairments, thyroid disorders and musculoskeletal problems.  There is a wide spectrum of clinical presentations and some people will be more seriously affected than others.  Although some children and adults will require life-long support, many can lead independent lives with assistance.  The associated medical conditions can be treated.
  • The average life expectancy for a person with Down’s Syndrome is 50-60 years


Further information can be found from the Down’s Syndrome Association here: or

Tel: 0333 1212 300 (Open Monday to Friday 10am – 4pm)