I was told the test could be done up to but not past 13 weeks + 6 days. We decided to have it done as it is not invasive however, one thing to think about is whether you would go onto the further testing (amnio) should the result come back high risk.
We were advised that there was no point in doing the first test if we would not be prepared to go on with the second, as the reason is so the parents can make an informed decision about the pregnancy, if the end results meant the baby could be born with Down Syndrome.
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