Criteria

4-cavities

Large vessels

Kidneys

Stomach/Diaphragm

Spines

Face

1

4 visible cavities

Bifurcation of the visible pulmonary artery

Circular view of the first kidney

Visible heart

Visible dorsal spine

Upperlip visible

2

Visible heart tip

Visible ascending aorta

Circular view of the second kidney

Visible stomach

Visible sacrum

2 visible nostrils

3

Cross of the visible heart

Right ventricle visible

Rear kidney free of vertebral shadow cone

Spine not visible

Visible vertebral alignment of the dorsal spine with the sacrum

2 labial angles seen

4

A visible pulmonary vein

Wrapping of the pulmonary artery around the aorta

Visible cortico-medullary or pyelon differentiation

Diaphragm interface seen from front to back

Skin continuity

5

Visible descending aorta

Thigh and neck visible

Amniotic fluid beyond the skin

6

Area of interest occupying more than half of the image