Выше.http://www.ds-health.com/risk.htmAge (years)  Frequency of Fetuses with DownSyndrome to Normal Fetusesat 16 weeks of pregnancy  Frequency of Live Births ofBabies with Down Syndrometo Normal Births  15 - 19  ----  1 / 1250  20 - 24  ----  1 / 1400  25 - 29  ----  1 / 1100  30 - 31  ----  1 / 900  32  ----  1 / 750  33  1 / 420  1 / 625  34  1 / 325  1 / 500  35  1 / 250  1 / 350  36  1 / 200  1 / 275  37  1 / 150  1 / 225  38  1 / 120  1 / 175  39  1 / 100  1 / 140  40  1 / 75  1 / 100  41  1 / 60  1 / 85  42  1 / 45  1 / 65  43  1 / 35  1 / 50  44  1 / 30  1 / 40  45 and older  1 / 20  1 / 25