Maternal age (years) | Down syndrome/trisomy 21 risk (1:n) | Edwards syndrome/trisomy 18 risk (1:n) | Patau syndrome/trisomy 13 risk (1:n) | Combined trisomy 21/18/13 risk (1:n) | ||||||||||||
CVS | Amnio | Term | CVS | Amnio | Term | CVS | Amnio | Term | CVS | Amnio | Term | |||||
18 | 1150 | 1210 | 1495 | 2520 | 3150 | 9010 | 6985 | 7945 | 13,700 | 710 | 790 | 1175 | ||||
19 | 1145 | 1205 | 1490 | 2515 | 3145 | 8985 | 6970 | 7930 | 13,670 | 705 | 785 | 1165 | ||||
20 | 1135 | 1200 | 1475 | 2510 | 3135 | 8960 | 6955 | 7905 | 13,635 | 705 | 780 | 1160 | ||||
21 | 1125 | 1185 | 1460 | 2500 | 3125 | 8930 | 6925 | 7875 | 13,580 | 695 | 775 | 1150 | ||||
22 | 1110 | 1165 | 1440 | 2490 | 3110 | 8885 | 6890 | 7835 | 13,510 | 690 | 765 | 1135 | ||||
23 | 1090 | 1150 | 1415 | 2470 | 3090 | 8825 | 6840 | 7780 | 13,410 | 680 | 755 | 1115 | ||||
24 | 1065 | 1120 | 1380 | 2450 | 3060 | 8745 | 6770 | 7700 | 13,275 | 670 | 740 | 1095 | ||||
25 | 1030 | 1085 | 1340 | 2415 | 3020 | 8630 | 6675 | 7590 | 13,090 | 650 | 720 | 1065 | ||||
26 | 975 | 1030 | 1285 | 2375 | 2970 | 8480 | 6545 | 7445 | 12,840 | 625 | 690 | 1025 | ||||
27 | 925 | 975 | 1220 | 2320 | 2900 | 8280 | 6375 | 7250 | 12,500 | 600 | 660 | 980 | ||||
28 | 855 | 900 | 1140 | 2245 | 2805 | 8010 | 6145 | 6990 | 12,050 | 560 | 620 | 920 | ||||
29 | 770 | 825 | 1045 | 2145 | 2680 | 7660 | 5850 | 6655 | 11,470 | 515 | 575 | 850 | ||||
30 | 685 | 730 | 935 | 2020 | 2525 | 7215 | 5475 | 6225 | 10,735 | 465 | 520 | 770 | ||||
31 | 590 | 630 | 815 | 1865 | 2330 | 6655 | 5015 | 5700 | 9830 | 410 | 455 | 675 | ||||
32 | 490 | 535 | 695 | 1675 | 2095 | 5990 | 4475 | 5085 | 8770 | 350 | 390 | 580 | ||||
33 | 400 | 430 | 570 | 1460 | 1825 | 5220 | 3870 | 4400 | 7585 | 290 | 325 | 480 | ||||
34 | 310 | 345 | 455 | 1225 | 1535 | 4380 | 3235 | 3680 | 6345 | 230 | 260 | 385 | ||||
35 | 240 | 260 | 350 | 990 | 1235 | 3530 | 2615 | 2975 | 5130 | 180 | 200 | 300 | ||||
36 | 180 | 195 | 265 | 765 | 955 | 2725 | 2055 | 2335 | 4030 | 135 | 150 | 225 | ||||
37 | 130 | 145 | 195 | 565 | 710 | 2025 | 1580 | 1800 | 3100 | 99 | 115 | 170 | ||||
38 | 95 | 105 | 145 | 410 | 510 | 1455 | 1210 | 1375 | 2370 | 72 | 83 | 125 | ||||
39 | 71 | 79 | 110 | 290 | 360 | 1035 | 930 | 1060 | 1825 | 53 | 61 | 94 | ||||
40 | 52 | 60 | 85 | 205 | 255 | 735 | 730 | 830 | 1430 | 39 | 45 | 72 | ||||
41 | 40 | 46 | 66 | 150 | 185 | 530 | 590 | 670 | 1160 | 30 | 35 | 56 | ||||
42 | 32 | 38 | 54 | 110 | 140 | 395 | 495 | 560 | 970 | 23 | 28 | 45 | ||||
43 | 27 | 31 | 45 | 87 | 110 | 310 | 425 | 485 | 840 | 19 | 23 | 37 | ||||
44 | 22 | 26 | 39 | 70 | 88 | 250 | 380 | 435 | 745 | 16 | 19 | 32 | ||||
45 | 19 | 23 | 34 | 60 | 74 | 215 | 350 | 395 | 685 | 14 | 16 | 28 | ||||
46 | 18 | 21 | 31 | 52 | 65 | 185 | 325 | 370 | 640 | 12 | 15 | 25 | ||||
47 | 16 | 19 | 29 | 47 | 59 | 170 | 310 | 355 | 610 | 11 | 14 | 24 | ||||
48 | 15 | 18 | 27 | 44 | 55 | 155 | 300 | 340 | 590 | 11 | 13 | 22 | ||||
49 | 15 | 18 | 26 | 41 | 52 | 150 | 290 | 330 | 570 | 10 | 12 | 21 |
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