It is estimated that about seventy percent of women have an ultrasound done when they are pregnant. With the availability of new technologies for imaging, various terms such as 2D, 3D and 4D have become more common.
2D is the old standard for ultrasound but over the years has been replaced by 3D and 4D. 2D ultrasound usually gives the outlines and images of the fetus but also enables one to see the baby’s internal organs. This may enable diagnosis of problems in the kidneys, internal tissues as well as heart defects.
Ultrasound is also known as scans and can be performed because of various reasons. A medical ultrasound during pregnancy usually works on a similar principle as that of Sonar which is used in oceanography. The technician or individual performing the ultrasound normally uses an ultrasound probe that is hand-held.
The ultrasound probe is used for the generation and receiving of sound waves of high frequency which cannot be detected by the human ear. During each scan, many sound waves are produced. These are absorbed and bounced back from body fluids, human tissue and bones resulting to the creation of images that are similar to the negative of a photograph.