NUCHAL TRANSLUCENCY SCREENING

Provided byAtlanta Perinatal Associates

RISK FOR DOWN SYNDROME (AND OTHER CHROMOSOMAL ABNORMALITIES)

BASED ON MOTHER'S AGE

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

“Low Risk”

“High Risk”

WHAT IS AN NT?

NORMAL NT

ABNORMAL NT

NT Measurement Allows Adjustment in Age-Related Risk

Free Beta and PAPP-A Allow Further Adjustment in Risk

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

PAPP-A FREE BETA

RISK FOR DOWN SYNDROME (Adjusted following NT Measurement)

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

“Low Risk”

“High Risk”

NT Measurement Allows Adjustment in Age-Related Risk