DR NAJEEB LAYYOUS / SCIENCE PHOTO LIBRARY DR NAJEEB LAYYOUS / SCIENCE PHOTO LIBRARY
Foetus' face. Coloured 3-D ultrasound scan of a foetus' face. The foetus' nose is at centre, with the mouth slightly left and below it. It is holding one of its hands against its forehead at upper right and the other against its chin at lower left. 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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