What is an Amniocentesis?

Amniocentesis is a test performed during pregnancy to look at the baby's chromosomal development and to sometimes check if the lungs are developed enough for birth. The procedure entails removing some of the amniotic fluid for testing. You can find more information here: http://www.cpmc.org/learning/documents/amnio-ws.html#What%20is%20an%20Amniocentesis?
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