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ultrasound diagnosis of fatal anomalies

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APPENDIX

mm

1,6

mm

1,05

1,5

1,4

1,3

1,00

0,95

0,90

0,85

97 %

1,2

1,1

97 %

0,80

0,75

25 %

1,0

0,9

0,8

25 %

0,70

0,65

0,60

0,55

0,7

16 20 24 28 32 36

40

Weeks

0,50

14 18 22 26 30 34

38

Weeks

Snijders, Nicolaides, Fetal biometry at 14 – 40 weeks gestation,

Ultras. Obstet. Gynecol. 1993

Snijders, Nicolaides, Fetal biometry at 14 – 40 weeks gestation,

Ultras. Obstet. Gynecol. 1993

Fig. 19.33

ratio.

Head circumference/thoracoabdominal circumference

Fig. 19.34

Biparietal diameter/fronto-occipital diameter ratio.

mm

2,2

mm

5,0

2,0

4,0

95 %

1,8

1,6

3,0

5 %

1

1,4

97 %

2,0

1,2

1,0

25 %

1,0

2

0,8

14 18 22 26 30 34

38

Weeks

0,0

16 18 20 22 24 26 28 30 32 34 36 38 40

Weeks

3

Snijders et al., Ultras Obstet Gynecol. 1991

Tan et al., Am J Cardiol 1992, 70, 1159 – 67

Fig. 19.35 Biparietal diameter/femur length ratio. Fig. 19.36 Ventricular septum width.

4

5

358

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