Foetus' face. Coloured 3-D ultrasound scan of a foetus' face in profile. The foetus' left eye at centre right, with the nose and mouth to the left and below it and its left ear at right. It is holding one of its hands (left) in front of its mouth. The tissue running down the left edge is the placenta. Ultrasound scanning is a diagnostic technique that sends high- frequency sound waves into the body via a transducer. The returning echoes are recorded and used to build an image of an internal structure. Foetal ultrasound scanning is routine during pregnancy.
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