Which procedure involves the assessment of cells that have passed through the placenta?

Question

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Maternal blood sampling can be used to assess fetal cells that have passed through the placenta and entered the mother's bloodstream. This non-invasive procedure can detect certain genetic conditions and sex of the fetus.

Answer: D
 Chorionic villus sampling involves taking a small sample of the placenta, which contains fetal cells, to assess for genetic abnormalities. However, this procedure is invasive and carries a small risk of pregnancy complications.

Amniocentesis (C) involves the sampling of the amniotic fluid surrounding the fetus to assess for genetic abnormalities. Preimplantation genetic diagnosis (B) involves screening embryos created via in vitro fertilization prior to implantation in the uterus. These procedures do not involve the assessment of cells that have passed through the placenta.

Which Procedure Involves the Assessment of Cells That Have Passed