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As with all tests in pregnancy, combined screening for Down’s syndrome is optional. This means that the screening will only identify a baby as being at a ‘high’ or ‘low risk’ of being affected by Down’s syndrome.
Occasionally during the scan, a miscarriage might be diagnosed even though you might still 'feel pregnant'.
We also like to arrange this for around 12 weeks, but it can be performed between 10 and 14 weeks.
Sometimes, it is not possible to take measurements of the nuchal translucency.
Normally, the placenta will move away from the lower part of the uterus (womb) and the birth canal as pregnancy progresses.
This is a scan which measures the blood flow from your uterus to the placenta and is done at 22-24 weeks.