At what gestational age is the standard 20-week ultrasound typically performed?

At what gestational age is the standard 20-week ultrasound typically performed?

• A. 16 to 18 weeks
• B. 18 to 20 weeks
• C. 20 to 22 weeks
• D. 22 to 24 weeks

Answer: (B)

The standard 20-week ultrasound, often referred to as the mid-pregnancy anatomy scan or anomaly scan, is typically performed between 18 to 20 weeks of gestation. This timing is ideal because it allows for the most accurate assessment of fetal anatomy, including the evaluation of major organs, structures, and the overall growth and development of the fetus. During this period, the fetus is large enough to be visually assessed but not so large that the examination becomes challenging. Performing the ultrasound during this window also enables healthcare providers to identify potential abnormalities early enough in the pregnancy that further intervention or planning can be made if necessary. Hence, the 18 to 20 weeks timeframe is a widely accepted standard for this important prenatal check-up.

The standard 20-week ultrasound, often referred to as the mid-pregnancy anatomy scan or anomaly scan, is typically performed between 18 to 20 weeks of gestation. This timing is ideal because it allows for the most accurate assessment of fetal anatomy, including the evaluation of major organs, structures, and the overall growth and development of the fetus.

During this period, the fetus is large enough to be visually assessed but not so large that the examination becomes challenging. Performing the ultrasound during this window also enables healthcare providers to identify potential abnormalities early enough in the pregnancy that further intervention or planning can be made if necessary. Hence, the 18 to 20 weeks timeframe is a widely accepted standard for this important prenatal check-up.