Amniocentesis
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American Congress of Obstetricians and Gynecologists
http://www.acog.org
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American Pregnancy Association
http://www.americanpregnancy.org
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Canadian Women's Health Network
http://www.cwhn.ca
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The Society of Obstetricians and Gynaecologists of Canada
http://www.sogc.org
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The American College of Obstetricians and Gynecologists, Invasive Prenatal Testing for Aneuploidy, Practice Bulletin No. 88, December 2007; Reaffirmed 2009.
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Chorionic villus sampling (CVS). American Pregnancy Association website. Available at: http://www.americanpregnancy.org/prenataltesting/cvs.html. Updated April 2006. Accessed October 2, 2012.
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Later childbearing. American College of Obstetricians and Gynecologists website. Available at: http://www.acog.org/~/media/For%20Patients/faq060.pdf?dmc=1&ts=20121002T1240392696. Accessed October 2, 2012.
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Screening and monitoring during pregnancy. EBSCO DynaMed website. Available at: http://dynamed.ebscohost.com. Updated September 14, 2012. Accessed October 2, 2012.

