Which Statement Regarding Various Biochemical Assessments Used During Pregnancy Is

question 3

Multiple Choice

Which statement regarding various biochemical assessments used during pregnancy is correct?

• 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 between 10 and 12 weeks of gestation in order to give parents time to consider options.
• C) Percutaneous umbilical blood sampling (PUBS) is one of the multiple marker screen tests for Down syndrome.
• D) MSAFP is a screening tool only; it identifies candidates for more definitive procedures.

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Definitions:

Sampling Distribution

The distribution pattern of a statistic that emerges from analyzing a large collection of samples taken from a specified group.

Sample Mean

The average value of a sample set of numbers, calculated by adding them together and dividing by the number of samples.

Central Limit Theorem

A statistical theory that states the distribution of sample means approaches a normal distribution as the sample size becomes larger, regardless of the population's distribution.

Sampling Distribution

The configuration of probability for a given statistic, determined by a random sample.