Don't worry too much: It depends on the center you get measured at, but generally it is thought that any NT measurement below 3.5mm is considered "normal" or low risk for Down's syndrome when your baby measures between 45 and 84mm long. It is also said that 9 out of 10 babies with NT measurements between 2.5 and 3.5mm will be completely normal.
Answered 10/23/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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