Trisomy 13 is due to the presence of an extra copy of chromosome 13. Trisomy 13 is the cause of Patau syndrome and is associated with a high rate of miscarriages . Children with trisomy 13 typically have congenital heart defects and other serious medical conditions . Rarely survive beyond the first year of life . It is estimated that trisomy 13 is present in about 1 in 16,000 births
- U.S. National Library of Medicine. Genetics Home Reference. Trisomy 13. ghr.nlm.nih.gov/condition/trisomy-13. Accessed July 12, 2012.