By Michelle Roberts Health reporter, BBC News
A DNA blood test for Down's syndrome could save nearly all pregnant women from invasive tests like amniocentesis, say experts.
Invasive testing takes place in 3% to 5% of pregnant women in the UK - some 30,000 women - and increases the risk of miscarriage.
The new DNA blood test could bring this down to 0.1%, according to a study in the British Medical Journal.
Around one woman in every 100 who has an invasive test will miscarry.
Some faced with the dilemma choose not to go for a diagnostic test - which involves having a needle inserted into their bump to draw off a sample of placenta cells or some of the fluid that bathes the baby - particularly if their estimated risk of having a child with Down's syndrome is smaller than the chance of miscarriage. - BBC
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