These tests are only available for pregnant women who have an enlarged risk on a baby with a chromosomal abnormality based on the combination test or the NIPT.These tests are only available for pregnant women who have an enlarged risk on a baby with a chromosomal abnormality based on the combination test or the NIPT.
Chorionic villus test
With the chorionic villus test the gynaecologist will take a little peace of placental tissue through the vagina or the abdomen. This tissue will be tested for chromosomal abnormalities.
- How long does this procedure take? 15 to 20 minutes.
- When can I take this test? From the eleventh week of pregnancy.
- Who will preform this procedure? The gynaecologist.
- Risks of miscarriage? The chorionic villus test increases the chance of a miscarriage by 0,5%.
- When will I get the results? After 5 to 10 days.
If an abnormality is found
If the child has any chromosomal abnormalities you can choose to abort the pregnancy. Up to 14 weeks of pregnancy this can be preformed by curettage. After week 14 you will get medication from the hospital in the form of vaginal tablets to make your body repel the pregnancy.
Amniocenteses
With an amniocenteses the gynaecologist takes a bit of amniotic fluid. The cells in this amniotic fluid will be tested for chromosomal abnormalities.
- How long does the procedure take? 15 to 20 minutes.
- When can I take this test? From the sixteenth week of pregnancy
- Who will preform this procedure? The gynaecologist.
- Risks of miscarriage? The amniocenteses increases the chance of a miscarriage by 0,3%.
- When will I get the results? The first results of the test (checking for some chromosome abnormalities and the sex of the baby) will be given by phone after 3 to 7 workdays. This phonecall will not provide all the results yet; the definite results include results of all chromosomes.
- Met deze test worden echter niet alle chromosomen onderzocht. Daarom krijg je na 3 weken de definitieve uitslag van de vruchtwaterpunctie, na onderzoek van alle chromosomen.
If an abnormality is found
If the child has any chromosomal abnormalities and you choose to abort the pregnancy it will be too late to curretate, so medication will be used to abort the pregnancy.