Skip to main content

This will depend on the type of chromosomal or genetic condition that you or the father of the baby carries. We may:

  • offer you or the father of the baby a referral to medical genetics to discuss your options
  • offer the partner of the person who carries a chromosomal condition a blood test to see if there is a chance that your baby may have the chromosomal condition, or
  • offer you chorionic villus sampling (CVS) or amniocentesis to see whether your baby has the chromosomal condition.

If we offer you CVS or amniocentesis you should be aware that both of these tests can cause a miscarriage.

Having a CVS or amniocentesis carries an additional risk of miscarriage which is
likely to be below 0.5% (around 1 in 200) of pregnancies. The additional risk of
miscarriage following CVS or amniocentesis in a twin pregnancy is around 1%
(1 in 100) of pregnancies.