Edited sentence: His paper, published in the Journal of the British Medical Ultrasound Society, mainly emphasizes that the non-invasive test, called the foetal 'nuchal thickness' measurement, is not as useful as is widely thought because of the high incidents of false positives it gives.Hylton Meire, the retired physician and author of texts on ultrasound, calculates that for every 50 children with Down's Syndrome successfully identified and killed by abortion, 160 non-affected babies are lost by miscarriage after the test.The risks of amniocentesis to the unborn child have long been known but now a new (2007) analysis by a British doctor has shown that using the tests in seek-and-destroy missions for Down's syndrome and other genetic abnormalities results in the deaths of hundreds of healthy babies every year in Britain