Which test is performed as early as week 5 and allows access to the fetal circulation and direct visualization of the embryo, permitting the diagnosis of malformations?

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Embryoscopy is a test that is performed as early as week 5 and allows access to the fetal circulation and direct visualization of the embryo, permitting the diagnosis of malformations. Amniocentesis and CVS are typically performed later in pregnancy (around week 15-20) and involve sampling of amniotic fluid or placental tissue, respectively. Sonoembryology is not a commonly used term in prenatal testing.

Which Test Is Performed as Early as Week 5 and Allows