Which procedure uses very-high-frequency sound waves to detect structural abnormalities or multiple pregnancies, measure fetal growth, judge gestational age, and evaluate uterine abnormalities?
a) Ultrasound sonography
b) Sonoembryology
c) Embryoscopy
d) Sonogram
Answer: a
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a. changing-criterion design b. A-B-A-B design c. multiple-baseline design d. interaction design
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A nonexperimental approach to studying talk therapy is to survey people who
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The difficulty index of a test item equals the difference in the proportions of examinees in the
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