Abstract

Fetal ultrasound imaging has become an indispensable tool in obstetric practice. In spite of early reports revealing a low sensitivity for diagnosing birth defects, ultrasound has become established as a safe and widely used screening test, best performed at about 20 weeks’ gestation. To maximize effectiveness of ultrasound screening, proper sonographer training and quality assurance is essential. Patients undergoing prenatal ultrasound should be made aware of the limitations of this tool for detecting anomalies. Prenatal detection has several practical benefits, including parental preparation, delivery planning, and optimal pediatric care. Effective noninvasive screening tests for aneuploidies have been developed and are superior to maternal age alone as a method of identifying candidates for invasive testing.

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