It depends on which cells in the body have the 2 copies of chromosome 13 and which have 3. If all of the heart cells have 3 copies of chromosome 13, the risk to have a heart defect may be the same. If all of the kidney cells have 2 copies of chromosome 13, the risk to have a kidney abnormality may be lower. Mosaicism is very complicated, and it is challenging to predict how a baby will be affected. Mosaicism means having more than one type of cell in the body. In the case of mosaic trisomy 13, it means some cells have the normal number of chromosome 13 (2 copies) and some cells have the abnormal number (3 copies).
Other Questions About Trisomy 13
- Will my child be less severely affected if they have mosaic Trisomy 13?
- Why does my doctor seem to want me to have an abortion because my baby has Trisomy 13?
- Where do I find other families with a child with Trisomy 13?
- Where can I learn more about Trisomy 13?
- What support resources are available for women during their pregnancy who are expecting a baby affected by Trisomy 13?
