Which membrane forms the placenta and can yield cells for early prenatal diagnosis?

Question

Quizplus · Accepted Answer

The chorion forms the outer membrane of the placenta and is also known as the fetal component of the placenta. It contains cells that can be used for early prenatal diagnosis through chorionic villus sampling (CVS). The other options (amniotic fluid, allantois, and yolk sac) are also involved in fetal development, but do not form the placenta.

Which Membrane Forms the Placenta and Can Yield Cells for Early