The anomaly scan , also known as the anatomy scan or 20 week scan , is one of the most important ultrasound scans during pregnancy. It is typically performed around the 18th to 22nd week of gestation and helps examine the development of the baby and the maternal pelvic organs. This scan is routine and offered to all pregnant women to check for fetal anomalies, structural abnormalities, and monitor fetal growth. What Is an Anomaly Scan ? An anomaly scan is a detailed second-trimester ultrasound ... An anomaly scan , also known as a 20-week ultrasound, is a prenatal ultrasound done between 18 and 22 weeks of pregnancy. It examines the fetus’s physical growth and can spot significant anatomical defects as well as some congenital diseases. A 2D, 3D, or even 4D ultrasound will be used by the healthcare provider to obtain pictures of the fetus inside your uterus. The sonographer will take measures to ensure the fetus is developing proportionately to its age. In an anomaly scan report ... An anomaly scan or TIFFA scan is the most important pregnancy ultrasound scan . Read this article to learn more about the importance, meaning, and schedule. Find out more about the 20-week screening scan (also called the anomaly scan ), which looks for 11 different conditions in your baby. Find out how to get it, what happens during the test and when you get the results.