AJ PHOTO / SCIENCE PHOTO LIBRARY AJ PHOTO / SCIENCE PHOTO LIBRARY
Amniocentesis. Obstetrician holding a syringe of amniotic fluid during an amniocentesis test on a pregnant woman. During amniocentesis a needle is inserted through the woman's abdomen into the amniotic sac, which surrounds the foetus, and a sample of the amniotic fluid is extracted. The cells extracted in the fluid will be screened for genetic or chromosomal disorders, such as Down's syndrome.
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