Antenatal Results and Choices - ARC - UK Charity offering information and support for those considering, going through or making decisions based on the results of pre-natal tests. - http://www.arc-uk.org
NT Laboratories - Offers information on a variety of prenatal tests, including amniocentisis, and the ultra-screen. - http://www.ntdlabs.com/
University of Pennsylvania - Information regarding chorionic villi sampling. - http://www.obgyn.upenn.edu/genetics/cvs.html
Mother and Child - Discusses purpose and procedure of chorionic villus sampling. Includes list of advantages and disadvantages compared to amniocentesis. - http://www.hon.ch/Dossier/MotherChild/common_procedures/chronic_villi.html
fFN Test - Offers information about premature labor and using the fetal fibronection test to assess the risk of premature delivery. - http://preterm-labor.ffntest.com/
Prenatal Testing - Definitions of the following testing procedures: amnioscentesis, ultrasound, chorionic villi sampling, and fetal development. - http://www.w-cpc.org/pregnancy/testing.html