The 18-22 Week Morphology Scan (sometimes called an Anomaly Scan) is a routine examination which most Australian women have in the mid-trimester of their pregnancy. At Exact Radiology Clinics we recommend that the scan be performed after 19 weeks as this allows for a better assessment of the baby. The scan involves a Sonographer applying gel to your lower abdomen and moving a transducer (probe) over the skin to obtain images of the baby. A Morphology Scan is used to assess the foetal anatomy (morphology), early foetal growth, placental position and amniotic fluid volume.