2025
Prenatal screening: understanding trisomy 18
Category (s):
Genetics
Pregnancy
Welcome
Trisomy 18 is the result of an additional chromosome at the level of chromosome 18. Also called Edwards syndrome, it affects on average one in 4,500 births. It is also the cause of many miscarriages.
It is associated with intellectual disability and a number of birth defects. Over 95% of fetuses will die during pregnancy. Like trisomy 13 and 21, maternal age is the main risk factor for having a baby with Down syndrome. During pregnancy, some signs may be present including growth retardation, the presence of malformations and choroid plexus cysts.
Trisomy 18 presents multiple serious problems for babies:
- Congenital abnormalities
- Intellectual disability
- Severe microcephaly
- Heart defects
- Facial malformation
Fetal DNA is the screening that offers the highest detection rate for trisomy 18. If screening showed a high risk, genetic referral and prenatal diagnosis would be recommended.
You would like to perform a screening test by Prenato fetal DNA? Perform it, in a single blood test, from 10E week of pregnancy.
The prenato.ca website and the comprehensive information it contains are intended as practical tools for expectant and new parents, as well as for women throughout the various stages of their lives. This information is not intended to replace the skills, knowledge, or experience of qualified healthcare professionals who are familiar with the specific facts, circumstances, and symptoms of each individual. Consequently, Prenato and its staff cannot be held liable for any adverse effects or consequences resulting from the use of the information provided on this site. It is the user's responsibility to consult a physician or a qualified healthcare professional appropriate to their specific needs for any personal health concerns.
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