Which test is performed after 18 weeks of pregnancy by collecting a small amount of blood from the umbilical cord for testing?

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The test described is fetal blood sampling (FBS), also known as cordocentesis. It is typically performed after 18 weeks of pregnancy and involves collecting a small amount of blood from the umbilical cord for testing. This test can help diagnose certain fetal abnormalities and genetic disorders. Embryoscopy is a diagnostic procedure that involves inserting a thin, flexible tube into the uterus to visualize the embryo. Amniocentesis and chorionic villus sampling (CVS) are both prenatal diagnostic tests used to diagnose certain genetic disorders, but they involve testing samples of amniotic fluid or placental tissue, respectively, rather than fetal blood.

Which Test Is Performed After 18 Weeks of Pregnancy by Collecting