Genetics in Medicine

Medicine

Quiz 17 :

Prenatal Diagnosis and Screening

Quiz 17 :

Prenatal Diagnosis and Screening

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During which weeks of pregnancy is chorionic villus sampling generally performed?
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B

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What is one disadvantage of chorionic villus sampling compared to amniocentesis?
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D

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The results of a second trimester screen for your patient are the following: Low levels of unconjugated estriol Low levels of maternal serum α-fetoprotein High levels of free -human chorionic gonadotropin With what fetal disorder are these results consistent?
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C

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Why is an accurate estimate of gestational age necessary before maternal serum α-fetoprotein (MSAFP) is measured?
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Which of the following is associated with an increased level of maternal serum α-fetoprotein?
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For the majority of metabolic disorders, what is the recurrence risk in a family that has had an affected child?
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Nutritional supplementation of pregnant women with which of the following reduces the risk of neural tube defects in the fetus?
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What is the leading indication for prenatal testing in the United States?
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Which of the following is a procedure that is used for prenatal genetic testing?
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Why not lower the cutoff on maternal serum α-fetoprotein screens so that near complete ascertainment of neural tube defects via the screen would be had?
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What concern should arise when confined placental mosaicism is found for trisomy 15?
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Which of the following is NOT a component of first-trimester screening for aneuploidies?
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Which of the following are prenatal screens that might indicate a need for further testing?
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Which of the following is an advantage of prenatal biochemical testing for metabolic disorders compared to genetic testing?
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