Вот статьи о новом тесте (на анг.языке), где рассказывают, что есть новый способ определять Даун Синдром по крови матери с точностью 98%, начиная с 10 нед. Сама статья, где я это прочитала : http://healthland.time.com/2011/11/29/are-kids-with-down-syndrome-on-the-road-to-extinction/Цитаты: "In October, a San Diego biotech company began offering an exceptionally accurate maternal blood test for Down syndrome that can be administered as early as 10 weeks, long before a woman looks visibly pregnant. A study published last month in the journal Genetics in Medicine found that the DNA-based test, called MaterniT21, identifies 98.6% of Down syndrome pregnancies, with a false-positive rate of 0.2%, an achievement that study author and Brown University professor Jacob Canick hailed as a “major step for prenatal diagnosis.” "Insured women will pay $235 to learn their chances of having a baby with Down syndrome; the test will otherwise cost $1,900."