R IS K FO R DO W N SYNDRO ME (A N D O THER CHRO M O SO M A L A B N O RM A LITIE S) BASED O N M O TH E R 'S A G E 1/7 1/9 1/50 1/40 1/30 1/24 1/20 1/15 1/12 1/270 1/200 1/340 1/320 1/385 1/370 1/500 1/450 1/65 1/80 1/100 1/130 1/170 0.0% 4.0% 8.0% 12.0% 16.0% 15- 24 25- 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 #REF! “Low Risk” “High Risk”