August 2, 2024 mygyno Ultrasound scans in pregnancy have become almost routine as part of antenatal care. Affordability and availability also continue to improve. Ultrasound scanning technology has evolved over time, and 2D imaging is slowly being overtaken by 3D and 4D imaging. Fetal images obtained with modern machines are so real that a blur now exists between scanning for medical reasons, and purely as a fad.