Iceland is close to becoming the first country where no-one gives birth to a child with Down's syndrome.
Pre-natal tests were introduced in the early 2000s, and the vast majority who receive a positive test have terminated their pregnancy.
While the tests are optional, all expectant mothers are informed about their availability, and up to 85 per cent choose to take it.
It’s called the Combination Test, and uses ultrasound and blood tests – as well as factoring in the mother’s age, and determines whether the foetus will have a chromosome abnormality, the most common of which results in Down's syndrome.
On average, just one or two children with Down's syndrome are born in Iceland each year, sometimes, this is as a result of an inaccurate test.
"Babies with Down's syndrome are still being born in Iceland," said Hulda Hjartardottir, head of the Prenatal Diagnosis Unit at Landspitali University Hospital, adding: "Some of them were low risk in our screening test, so we didn't find them in our screening.”