The Anomaly Scan

The Anomaly Scan, performed between 18–22 weeks of pregnancy, is a detailed ultrasound examination that carefully assesses the developing baby from head to toe. It evaluates key fetal parameters such as head circumference (HC), biparietal diameter (BPD), abdominal circumference (AC), and femur length (FL) to ensure normal growth and development. The scan systematically examines the fetal brain, face, spine, heart (four-chamber and outflow tracts), stomach, kidneys, bladder, limbs, and umbilical cord, along with the placenta, amniotic fluid, and cervical length. Learning the anomaly scan is vital for every ultrasound professional, as it helps in the early detection of structural abnormalities, accurate assessment of fetal position and well-being, and timely intervention when needed. Mastering this skill enhances diagnostic confidence, builds patient trust, and establishes the scanner as an essential part of modern obstetric and fetal medicine practice.