Ultrasound and Maternal Serum Marker Tests Are Less Informative Than

question 88

Multiple Choice

Ultrasound and maternal serum marker tests are less informative than amniocentesis or chorionic villus sampling (CVS) in diagnosing trisomy 21 because

• A) ultrasound and maternal serum markers check chromosomes, and CVS and amniocentesis do not.
• B) ultrasound and maternal serum markers do not check chromosomes, and CVS and amniocentesis do.
• C) maternal serum markers and amniocentesis check chromosomes, and ultrasound and CVS do not.
• D) ultrasound and CVS check chromosomes, and maternal serum markers and amniocentesis do not.

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