BookmarkBookmarkTick

Q&A: Why CVS/amnio?

What exactly do diagnostic tests like CVS and amniocentesis look for? Do I need to have these tests?
ByPaula Kashtan
Updated
September 15, 2020
Hero Image

Both amniocentesis and CVS (chorionic villussampling) are diagnostic tests for chromosomal and genetic disorders such as Down syndrome and cystic fibrosis. Amnio also can detect neural tube defects such as spina bifida. About two or three of every hundred babies is born with such a defect, and most occur in the first three months of gestation. Because of the slightly increased miscarriage risk (more about this later), neither test is offered routinely. But, if your baby is at increased risk of chromosomal or genetic defects or earlier screenings suggest potential problems, expect to discuss the option of testing with your doc.

American College of Obstetrics and Gynecologists. Your pregnancy and birth. 4th ed. Washington, DC: ACOG; 2005.

Related Video
pregnant woman looking at sonogram

There May Be a New Noninvasive Way to Diagnose Fetal Genetic Disorders

profile picture of Ashley Edwards Walker
Ashley Edwards Walker
Contributing Writer
Published
08/27/2019

Should I Get Genetic Testing?

profile picture of Jennifer L.W. Fink
Jennifer L.W. Fink
Registered Nurse
pregnant woman holding sonogram

Prenatal Breakthrough: Introducing a Blood Test for Preeclampsia

profile picture of Anisa Arsenault
Anisa Arsenault
Associate Editor
Published
05/03/2018
Article removed.