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ThisDumbBtch t1_iy93kqs wrote

Reply to comment by Kouta27 in You don't see Asian people with down syndrome. by Dragod21

Downs isn't always found in ultrasounds

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Kouta27 t1_iy9u8n4 wrote

Is there a % of error? How much is it?

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ThisDumbBtch t1_iy9vb8x wrote

According to google: "About eight or nine out of 10 cases of Down syndrome are detected (classified as screen positive). This means that one or two out of 10 pregnancies with Down syndrome are missed (classified as screen negative)."

So, a fair amount are not diagnosed until birth.

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