@sunsandwaves
I'm worried my score wasn't good. My sons was 1 in 10000 I've just had my seconds and it's 1 in 4500 is that a bad score?
From this website
patient.info/pregnancy/pregnancy-screening-tests/prenatal-screening-and-diagnosis-of-downs-syndrome
Down's syndrome screening test will give the risk in this pregnancy of the baby being born with Down's syndrome. For example, the test may show that there is a 1 in 1,000 risk of having a baby with Down's syndrome. This means that for every 1,000 pregnant women, one will have a baby born with Down's syndrome and 999 will have a baby born without Down's syndrome. So, this would be quite a low risk.
In the UK, the National Screening Committee has suggested a cut-off level to differentiate between screening test results with a higher risk that the baby is born with Down's syndrome and those with a lower risk.
The cut off is 1 in 150. This means that if your screening test results show a risk of between 1 in 2 to 1 in 150 that the baby has Down's syndrome, this is classified as a higher risk result. If the results show a risk of 1 in 151 or more, this is classified as a lower risk result. The higher the second number gets, the lower the risk becomes (the less likely you are to have a baby with Down's syndrome).
So, when you are given your results, you will be told whether this is a lower risk or a higher risk result.