Another problem has arisen over the accuracy of the screening tests for Down's syndrome. This time Italian doctors have found that a computer software program for the so called triple test, designed to assess risk of Down's, has been coming up with
They discovered the fault when their own laboratory ran its tests on two pregnant women. On both occasions, the pregnancies were ended after the laboratory discovered a far higher risk of Down's than had the computer program (The Lancet, April 6, 1996).
The triple test measures a pregnant woman's alpha fetoprotein and human chorionic gonadotropin levels, plus several other factors to determine risk of her baby being born with Down's syndrome.