What are ONTD, Down syndrome and Trisomy 18?
ONTD or open neural tube defects are the most common group of birth defects. They are also referred to as open spine or open skull. This group of birth defects usually occur without a family history and is not associated with maternal age. Down syndrome and Trisomy 18 are both chromosomal disorders that result from having an extra chromosome in each cell. The extra chromosome causes birth defects and mental retardation.
Related Questions
- Are women who screen positive for Down syndrome, trisomy 18, or ONTDs in a previous pregnancy eligible for an amniocentesis in their current pregnancy?
- Do the results of prenatal screening provide information other than risk for Down syndrome, trisomy 18 and open neural tube defects?
- What are ONTD, Down syndrome and Trisomy 18?
