Genetic Risk Maternal Age
| Age of Mother
|
Risk of Trisomy 21
|
Risk of Any Chromosomal Abnormality
|
| 20
|
1 in 1667
|
1 in 526
|
| 21
|
1 in 1667
|
1 in 526
|
| 22
|
1 in 1429
|
1 in 500
|
| 23
|
1 in 1429
|
1 in 500
|
| 24
|
1 in 1250
|
1 in 476
|
| 25
|
1 in 1250
|
1 in 476
|
| 26
|
1 in 1176
|
1 in 476
|
| 27
|
1 in 1111
|
1 in 455
|
| 28
|
1 in 1053
|
1 in 435
|
| 29
|
1 in 1000
|
1 in 417
|
| 30
|
1 in 952
|
1 in 384
|
| 31
|
1 in 909
|
1 in 384
|
| 32
|
1 in 769
|
1 in 323
|
| 33
|
1 in 625
|
1 in 286
|
| 34
|
1 in 500
|
1 in 238
|
| 35
|
1 in 385
|
1 in 192
|
| 36
|
1 in 294
|
1 in 156
|
| 37
|
1 in 227
|
1 in 127
|
| 38
|
1 in 175
|
1 in 102
|
| 39
|
1 in 137
|
1 in 83
|
| 40
|
1 in 106
|
1 in 66
|
| 41
|
1 in 82
|
1 in 53
|
| 42
|
1 in 64
|
1 in 42
|
| 43
|
1 in 50
|
1 in 33
|
| 44
|
1 in 38
|
1 in 26
|
| 45
|
1 in 30
|
1 in 21
|
| 46
|
1 in 23
|
1 in 16
|
| 47
|
1 in 18
|
1 in 13
|
| 48
|
1 in 14
|
1 in 10
|
| 49
|
1 in 11
|
1 in 8
|
