A test that can detect Down?s syndrome from the blood of pregnant women has raised the prospect of routine screening for the condition for every expectant mother who wants it.
Genetic markers that show whether a foetus has the chromosomal disorder can now be identified in the mother?s bloodstream, after research that promises the first reliable non-invasive prenatal test.
The experimental procedure, developed in Hong Kong, has been shown to diagnose 90%of Down?s syndrome cases in a small trial, while also correctly identifying 97% of foetuses that do not have the condition.
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