Anyone can have a pregnancy with a chromosomal abnormality – mothers of all ages, races and health conditions can be at risk.
There is nothing a parent can do to cause a chromosomal abnormality, or prevent it. However, certain risk factors can increase the chance of having a pregnancy with chromosomal abnormalities.
- Advanced maternal age
- Fetal ultrasound abnormality suggestive of aneuploidy
- Personal or family history of chromosomal abnormalities
- Positive serum screening test