SAMUEL ASHFIELD / SCIENCE PHOTO LIBRARY SAMUEL ASHFIELD / SCIENCE PHOTO LIBRARY
Pregnancy ultrasound. Doctor showing a pregnant woman several print-outs of an ultrasound scan of her unborn child. The pictures are obtained using the reflection of high- frequency sound waves to build up a picture of the unborn child in the uterus (womb), as seen on the monitor (upper centre). This safe, non-invasive procedure is used routinely in pregnancy to assess the growth and health of the developing foetus.
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