SATURN STILLS / SCIENCE PHOTO LIBRARY SATURN STILLS / SCIENCE PHOTO LIBRARY
Amniocentesis. Needle drawing up amniotic fluid from the amniotic sac in a pregnant woman's uterus. The transducer (left) is producing the image in the background, which is used to determine the best location for extraction. The cells in the extracted fluid are screened for genetic or chromosomal disorders, such as Down's syndrome.
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