Incidence of Down Syndrome

Incidence of Down Syndrome with Increasing Maternal Age

Incidence of Down Syndrome with Increasing Maternal Age
Maternal Age at Delivery Risk at Term
32 1/725
33 1/592
34 1/465
35 1/365
36 1/287
37 1/255
38 1/177
39 1/139
40 1/109
41 1/85
42 1/67
43 1/53
44 1/41
45 1/32
46 1/25
47 1/20
48 1/16
49 1/12