This really only confirms something that was less widely known already.
Two healthy babies are miscarried for every three Down\’s Syndrome babies that are detected and prevented from being born, research has suggested.
The tests themselves carry a risk of causing a miscarriage. But given that the vast majority of those having the tests are not carrying a Down\’s Syndrome child, the risks of causing a miscarriage to a non-Downs are almost as high as the number of Down\’s discovered.
Long known but rarely point out this.