

|
Mother's Age
|
Incidence of Down Syndrome
|
|
Under 30
|
Less than 1 in 1,000
|
|
30
|
1 in 900
|
|
35
|
1 in 400
|
|
36
|
1 in 300
|
|
37
|
1 in 230
|
|
38
|
1 in 180
|
|
39
|
1 in 135
|
|
40
|
1 in 105
|
|
42
|
1 in 60
|
|
44
|
1 in 35
|
|
46
|
1 in 20
|
|
48
|
1 in 16
|
|
49
|
1 in 12
|
| (Down Syndrome Risk Continued: Page 2) | |
| Referring Pages | Articles |