The difference between a macrosurgery and a 4D is that a 4D is one of the macrosurgery tests.
A macrosomia refers to a systematic ultrasound examination that provides a comprehensive understanding of the fetal structure, and the commonly used examination method is 2D ultrasound. If in the middle of pregnancy, i.e. 20-24 weeks of gestation, the fetus has enough space to move around in the uterus and the structure of each organ is well developed, a detailed examination can be carried out with the help of ultrasound to find out whether there are any abnormalities in the head, ventricle, heart, spine, gastric vesicles, kidneys and limbs of the fetus.
Four-dimensional is generally a three-dimensional imaging on a flat image intercepted by two-dimensional ultrasound as a way to understand the fetal structure. From there, three-dimensional images are acquired in real time and the dynamic activity of the fetus is observed, which is usually crucial for the timely detection of abnormal fetal structures. The display of internal structures is not as clear as with 2D ultrasound.
Patients can undergo these tests during pregnancy as recommended by their medical professionals.