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Down syndrome: Difference between revisions
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==Diagnosis== | ==Diagnosis== | ||
There are currently two types of tests available for women that will test for Down syndrome. The first tests are the screening tests. The screening tests estimate a women’s chance of giving birth to a Down syndrome baby, but they will not actually determine if a woman is pregnant with a Down syndrome fetus. These tests are often preformed via ultrasound. There is also a screening test that checks properties of the blood. The second tests can determine if a woman is pregnant with a Down syndrome fetus. These tests are the Diagnostic tests. There are three types of Diagnostic tests: Chorionic Villus Sampling (CVS), Amniocentesis, and Percutaneous Umbilical Blood Sampling (PUBS). [http://www.nads.org/pages_new/facts.html] | |||
Amniocentesis is preformed between the twelfth and twentieth week of the pregnancy. It tests the amniotic fluid, which surrounds the fetus.[http://www.babycenter.com/0_amniocentesis_327.bc] | |||
Chorionic Villus Sampling is a test preformed between the eighth and twelfth week of pregnancy. It is often preformed on woman over the age of thirty-five, because their chance of having a Down syndrome child greatly increases. This test is preformed by obtaining a biopsy of chorionic villi from the placenta[http://www.webmd.com/baby/chorionic-villus-sampling-cvs] | |||
The third Diagnostic test, Percutaneous Umbilical Blood Sampling, is done after twenty weeks of pregnancy. During this test, fetal blood is obtained from the umbilical cord. It is very similar to amniocentesis. It is often used when the other test have been inconclusive. [http://www.americanpregnancy.org/prenataltesting/percutaneousumbilical.html] | |||
==Health== | ==Health== | ||
