A client's chorionic villus sampling (CVS) reveals the presence of trisomy. How would the nurse interpret this test result?
1. Nondisjunction has not occurred.
2. The fetus's organ systems are involved.
3. There is trisomy in the placenta.
4. There is trisomy in at least one fetal tissue.
3
Rationale 1: Nondisjunction is the primary reason for mosaicism.
Rationale 2: It is not possible to determine if all organ systems are involved.
Rationale 3: Chorionic villus sampling can indicate trisomy only in the placenta.
Rationale 4: Amniocentesis is required to make this determination.
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