How can the ABO and Rh of the fetus be determined in utero?

Question

Quizplus · Accepted Answer

All of the above methods can be used to determine the ABO and Rh status of the fetus in utero.

Amniocentesis involves collecting a small sample of the amniotic fluid surrounding the fetus, which contains fetal cells that can be analyzed for blood type and Rh factor.

Chorionic villus sampling involves collecting a sample of the placenta tissue, which also contains fetal cells that can be analyzed for blood type and Rh factor.

Percutaneous umbilical cord sampling involves collecting a small sample of blood from the fetal umbilical cord, which can be analyzed for blood type and Rh factor.

Each of these methods carries some risk to the fetus, so they are generally reserved for cases where there is a specific medical need (such as identifying potential blood type conflicts between the mother and fetus).

How Can the ABO and Rh of the Fetus Be