Chromosome analysis of the fetus is usually accomplished through the testing of which?
a. Fetal serum
b. Maternal urine
c. Amniotic fluid
d. Maternal serum
ANS: C
Amniocentesis is the most common method to retrieve fetal cells for chromosome analysis. Viable fetal cells are sloughed off into the amniotic fluid, and when a sample is taken, they can be cultured and analyzed. It is difficult to obtain a sample of the fetal blood. It is a high-risk situation for the fetus. Fetal cells are not present in the maternal urine or blood.
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