Abstract
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• Discuss the role of transcerebellar diameter (TCD) in estimating fetal gestational age (GA) and compare its accuracy with other biometric parameters.
• Explain the advantages of TCD in assessing GA and its reliability in cases of intrauterine growth restriction (IUGR).
• Summarize the methodology and statistical findings that validate TCD as a reliable sonographic measurement for GA estimation.
What is the gold standard for calculating gestational age (GA) in the first trimester? A. Crown-rump length (CRL) B. Transcerebellar diameter (TCD) C. Biparietal diameter (BPD) D. Femur length (FL)
Head circumference (HC), BPD, and abdominal circumference (AC) can vary up to how many weeks from GA in the second and third trimesters? A. Two B. Three C. Four D. Five
Which fetal abnormality can potentially be predicted using the ratio of TCD to AC? A. Skeletal dysplasia B. Ventricular septal defect C. Intrauterine growth restriction (IUGR) D. Hydrocephalus
According to the article, what is the highest reported TCD value to date? A. 30.5 mm B. 38.2 mm C. 43.6 mm D. 48.4 mm
According to Table 1, which of the following biometric measurements had the least amount of standard deviation? A. TCD-GA B. BPD-GA C. AC-GA D. FL-GA
According to Table 1, which of the following biometric measurements had the greatest amount of standard deviation? A. AC-GA B. BPD-GA C. FL-GA D. TCD-GA
According to the article, how was the BPD measured during the sonographic examination? A. Inner to inner border B. Outer to outer border C. Outer to inner border D. Inner to outer border
Footnotes
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