Novi Sad, Yugoslavia

Normal fetal morphology

• complete ossification of the skull
• choroid plexuses fill the skull
• "butterfly shape" of the choroid plexuses
• uninterrupted midline echo

Fetal profile

• Visible nasal bone
• Measurement of the nuchal lucency

Transverse section of the abdomen

• abdominal wall closed
• normal size of stomach

Longitudinal section of the fetus

• diaphragm
• stomach seen below the diaphragm

Transverse section of the abdomen at the level of the cord insertion

• anterior abdominal wall closed
• normal insertion of the umbilical cord

Fetal bladder

• bladder seen, normal size

Fetal legs

Fetal hands

• both hands seen
• all long bones and fingers seen

Measurement of nuchal translucency (Snijders RJM et al)

• gestational age 11 - 14 weeks (CRL 45-84 mm) (Snijders RJM, Nicolaides KHN)
• maximal enlargement of the image (fetus occupies 75% of the whole image)
• longitudinal section of the fetus (profile clearly seen)
• fetus away from the amnion (three parallel lines seen)
• the biggest thickness behind the neck is measured calipers put on the tissue following the rule "on/on"