Depends: This can be a normal variant. Or, it maybe a sign of down syndrome.
Answered 4/21/2012
5.9k views
Nothing particular: It is present in about 4-7% of normal individuals on one side. It is present in 25-35% of kids with Down syndrome.The feature is thought to originate from the muscle tone and the way the fetus cups their hand in the womb. It is not a "test " for anything.
Answered 10/14/2017
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