PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY
Pregnancy ultrasound scan. Professor Yves Ville using an ultrasound transducer (in hand) to scan a pregnant woman's abdomen. The transducer emits high-frequency sound waves and detects the reflected echoes. The results are used to build an image of the unborn child in the womb (seen on the screen). This safe, non-invasive procedure is used routinely in pregnancy to assess the growth and health of the developing foetus, and to detect any abnormalities.
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