Maternal age | Down syndrome | Edwards syndrome (trisomy 18) | Patau syndrome (trisomy 13) | XXY | XYY | Turner syndrome genotype | Other clinically significant abnormality* | Total¶ |
<15 | 1 | <0.1 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2.2 |
15 | 1 | <0.1Δ | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2.2 |
16 | 0.9 | <0.1Δ | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2.1 |
17 | 0.8 | <0.1Δ | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2 |
18 | 0.7 | <0.1Δ | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 1.9 |
19 | 0.6 | <0.1Δ | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 1.8 |
20 | 0.5-0.7 | <0.1-0.1 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 1.9 |
21 | 0.5-0.7 | <0.1-0.1 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 1.9 |
22 | 0.6-0.8 | <0.1-0.1 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2 |
23 | 0.6-0.8 | <0.1-0.1 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2 |
24 | 0.7-0.9 | 0.1-0.1 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2.1 |
25 | 0.7-0.9 | 0.1-0.1 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2.1 |
26 | 0.7-1 | 0.1-0.1 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2.1 |
27 | 0.8-1 | 0.1-0.2 | <0.1-0.1 | 0.4 | 0.5 | <0.1 | 0.2 | 2.2 |
28 | 0.8-1.1 | 0.1-0.2 | <0.1-0.2 | 0.4 | 0.5 | <0.1 | 0.2 | 2.3 |
29 | 0.8-1.2 | 0.1-0.2 | <0.1-0.2 | 0.5 | 0.5 | <0.1 | 0.2 | 2.4 |
30 | 0.9-1.2 | 0.1-0.2 | <0.1-0.2 | 0.5 | 0.5 | <0.1 | 0.2 | 2.6 |
31 | 0.9-1.3 | 0.1-0.2 | <0.1-0.2 | 0.5 | 0.5 | <0.1 | 0.2 | 2.6 |
32 | 1.1-1.5 | 0.1-0.2 | 0.1-0.2 | 0.6 | 0.5 | <0.1 | 0.2 | 3.1 |
33 | 1.4-1.9 | 0.1-0.3 | 0.1-0.2 | 0.7 | 0.5 | <0.1 | 0.2 | 3.5 |
34 | 1.9-2.4 | 0.2-0.4 | 0.1-0.3 | 0.7 | 0.5 | <0.1 | 0.2 | 4.1 |
35 | 2.5-3.9 | 0.3-0.5 | 0.2-0.3 | 0.9 | 0.5 | <0.1 | 0.3 | 5.6 |
36 | 3.2-5 | 0.3-0.6 | 0.2-0.4 | 1 | 0.5 | <0.1 | 0.3 | 6.7 |
37 | 4.1-6.4 | 0.4-0.7 | 0.2-0.5 | 1.1 | 0.5 | <0.1 | 0.3 | 8.1 |
38 | 5.2-8.1 | 0.5-0.9 | 0.3-0.7 | 1.3 | 0.5 | <0.1 | 0.3 | 9.5 |
39 | 6.6-10.5 | 0.7-1.2 | 0.4-0.8 | 1.5 | 0.5 | <0.1 | 0.3 | 12.4 |
40 | 8.5-13.7 | 0.9-1.6 | 0.5-1.1 | 1.8 | 0.5 | <0.1 | 0.3 | 15.8 |
41 | 10.8-17.9 | 1.1-2.1 | 0.6-1.4 | 2.2 | 0.5 | <0.1 | 0.3 | 20.5 |
42 | 13.8-23.4 | 1.4-2.7 | 0.7-1.8 | 2.7 | 0.5 | <0.1 | 0.3 | 25.5 |
43 | 17.6-30.6 | 1.8-3.5 | 0.9-2.4 | 3.3 | 0.5 | <0.1 | 0.3 | 32.6 |
44 | 22.5-40 | 2.3-4.6 | 1.2-3.1 | 4.1 | 0.5 | <0.1 | 0.3 | 41.8 |
45 | 28.7-52.3 | 2.9-6 | 1.5-4.1 | 5.1 | 0.5 | <0.1 | 0.3 | 53.7 |
46 | 36.6-68.3 | 3.7-7.9 | 1.9-5.3 | 6.4 | 0.5 | <0.1 | 0.3 | 68.9 |
47 | 46.6-89.3 | 4.7-10.3 | 2.4-6.9 | 8.2 | 0.5 | <0.1 | 0.3 | 89.1 |
48 | 59.5-116.8 | 6-13.5 | 3-9 | 10.6 | 0.5 | <0.1 | 0.3 | 115 |
49 | 75.8-152.7 | 7.6-17.6 | 3.8-11.8 | 13.8 | 0.5 | <0.1 | 0.3 | 149.3 |