ultrasound diagnosis of fatal anomalies

SECOND SCREENING
Fig. 1.18 Second screening, 18–21 weeks.
Cross-sectional view of the fetal eye region, demonstrating
the hyaloid arteries supplying the lenses.
Fig. 1.19 Second screening, 18–21 weeks.
The posterior horn of the left lateral ventricle is
seen, with a normal width measurement of 3.8 mm.
Fig. 1.20 Second screening, 18–21 weeks.
The normal cerebellum is recognized as a dumbbell
shape. Between 20 and 23 weeks, its diameter in
millimeters corresponds approximately to the gestational
age (here 23 mm at 22 weeks).
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