Nurses Should Be Aware of the Strengths and Limitations of Various

Nurses should be aware of the strengths and limitations of various biochemical assessments during pregnancy,including that:

A) Chorionic villus sampling (CVS) is becoming more popular because it provides early diagnosis.
B) Screening for maternal serum alpha-fetoprotein (MSAFP) levels is recommended only for women at risk for neural tube defects.
C) Percutaneous umbilical blood sampling (PUBS) is one of the triple-marker tests for Down syndrome.
D) MSAFP is a screening tool only;it identifies candidates for more definitive procedures.