3d Ultrasound Obstetrics

3D Ultrasound (third dimension) is an ultrasound technique, this is frequently used during pregnancy, providing three-dimensional images of the fetus; It can be used anywhere on the body. This ultrasound allows you to see the width, height and depth of the images, in the same way that a 3D film operates, the difference is that in this type of ultrasound, no movement is shown.
There are different modes of scanning in medical and obstetric ultrasound; the standard way of diagnosis is with a 2D scan.

In contrast, 3D fetal scanning does not transmit ultrasound waves in a straight line, they are sent in different directions, different angles. Thus, the rebounding echoes are processed by software, which results in a reconstructed image of the volume of the unborn's surface or its internal organs; It is something very similar to the way an axial tomography machine constructs a computerized image with multiple X-ray shots.

3D Ultrasound is best done between weeks 24 and 32, and preferably between weeks 26 and 30. There are places where they advise you to go between weeks 26 and 28 to obtain better images.

After 32 weeks, there is a high probability that the fetus has descended to the pelvis and the chances of obtaining 3D images are nil. In the same way, as the baby is bigger, there is a lack of space and it is another impossibility to get a good image.