DR NAJEEB LAYYOUS / SCIENCE PHOTO LIBRARY DR NAJEEB LAYYOUS / SCIENCE PHOTO LIBRARY
Foetus's face. Coloured 3-D ultrasound scan of a foetus' face. The foetus' nose is at lower centre right, the mouth is below it. It is holding its hands against its cheeks. This was taken in the third trimester of pregnancy. 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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