Which test uses placental tissue to obtain fetal chromosomes?

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Multiple Choice

Which test uses placental tissue to obtain fetal chromosomes?

Explanation:
Using placental tissue to obtain fetal chromosomes is chorionic villus sampling. This test collects tissue from the chorion, part of the placenta, which contains fetal cells with the same genetic material as the fetus, allowing early chromosomal analysis (often in the first trimester). Amniocentesis, in contrast, analyzes fetal cells shed into the amniotic fluid and is typically performed later in pregnancy. Cordocentesis retrieves fetal blood from the umbilical cord for rapid testing, including karyotyping, but not placental tissue. Embryoscopy involves direct visualization of the embryo or fetus and does not sample placental tissue for chromosomes.

Using placental tissue to obtain fetal chromosomes is chorionic villus sampling. This test collects tissue from the chorion, part of the placenta, which contains fetal cells with the same genetic material as the fetus, allowing early chromosomal analysis (often in the first trimester).

Amniocentesis, in contrast, analyzes fetal cells shed into the amniotic fluid and is typically performed later in pregnancy. Cordocentesis retrieves fetal blood from the umbilical cord for rapid testing, including karyotyping, but not placental tissue. Embryoscopy involves direct visualization of the embryo or fetus and does not sample placental tissue for chromosomes.

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