Prenatal Testing Home>Reproductive_Health>Pregnancy_and_Birth>Prenatal Testing   Amniocentesis              Web Pages BabyCenter Find out how an ultrasound is done, what it can tell you about your baby and when you should have it done. Perinatology.com Reference for the clinical geneticist. How Stuff Works Illustrated narrative describing an assortment of testing decisions. CDC: Prenatal Discussion of HIV Testing Testing for the HIV virus during pregnancy. Prenatal Testing Definitions of the following testing procedures: amnioscentesis, ultrasound, chorionic villi sampling, and fetal development. fFN Test Offers information about premature labor and using the fetal fibronection test to assess the risk of premature delivery. AFP & Triple Screen Testing Testing information. Picture Perfect: The Politics of Prenatal Testing Article by Elizabeth Kristol, addressing the safety and necessity of screening. Mother and Child Discusses purpose and procedure of chorionic villus sampling. Includes list of advantages and disadvantages compared to amniocentesis. Health Library Overview of Chorionic Villi Sampling. Includes preparation, risks and affects. NT Laboratories Offers information on a variety of prenatal tests, including amniocentisis, and the ultra-screen. University of Pennsylvania Information regarding chorionic villi sampling.