The folks who do ultrasounds are generally called ultrasound technicians.
Name the four different types of ultrasounds listed in the CPT manual.
There is no proved data that ultrasounds are hazardous to fetus. However, in routine practice, three ultrasounds are done one in each trimester of pregnancy. These are considered totally safe by all the gynaecologists. Some ladies might have to undergo through more ultrasounds if some fetus anomaly is suspected. There is no evidence that these ultrasounds were harmful to fetus. So ultrasound during pregnancy is totally safe. The number of ultrasounds required are decided by the gynaecologists.
ultrasound
in 1957 by ian Donald
They used to get trans-vaginal ultrasounds. Never heard of trans-rectal ultrasound, but why not? Doctors are very inventive.
No, they are safe.
it can burst your ear drums and then you are screwed
Sonographer
Ultrasounds are usually done after the sixth or seventh month. However, if the pregnancy is high risk they can be done much sooner it depends on the case.
Years ago, an ultrasound could only be done in a 2D version. In most current times, 3D ultrasounds are popular but they do cost more.
"I don't know" Maybe scientist discovered it.