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Ultrasound works the same way as a ships sonor or a bats echolocation. Now, didn't that help?

When sound travels through a media like air or water it travels at a certain speed and some of the energy is absorbed by the media and some bounces off whatever it hits. This is like any other echo you have experienced in air. You shout and a certain time later your words come back to you.

By knowing the exact frequency of the orignal sound and density of the media the sound is moving through and some advanced math, you can calculate the exact distance the object the sound bounced off is from the source of the sound. With me so far?

When the health professional does an ultrasound they pass a little speaker and microphone (its one piece) over the womb. The speaker puts out a very high frequency sound of a known frequency. The sound that hits the baby bounces off and comes back to the microphone. With the help of a very fast computer the distance is calculated and each distance is assigned a gray scale value from white to black. Since this is done with such precision and accuracy, the tip of the nose would have one shade of gray while the cheek that is just a little bit farther away would be a little darker. By assembling all these gray shades side by side you start to see the image.

Have you ever taken a pencil and rubbed it over a piece of paper to see what someone has written on the previous sheet? Well this is kinda how the image looks.

By making adjustments to the intensity of sound and controlling the some other factors, the health professional can actually look inside the baby to see the heart or other organs. Ultrasounds are painless to the patient and painless to the baby. They even do ultrasounds on adults to see kindney stones or how the heart is operating. I've had an ultrasound on my heart. It was strange to watch the valves of my own heart operate! It didn't hurt.

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โˆ™ 2015-07-15 21:38:21
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Q: How do ultrasounds see babies?
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Related Questions

What does an ObGyn doctor do everyday?

Pap smears, birth control consultations, ultrasounds, and delivering babies.

What does obstetrics do?

they deliver babies they not only deliver babies but they are also the doctors to check on women who are pregnant. they give the woman her checkups and ultrasounds and fetal testing, so as you can see there is a lot more to obstetrics than just delivering babies, half the time they don't even deliver the babies themselves, a midwife or nurse that is certified will do it.

Where can I find information about pregnancy ultrasounds?

An ultrasound will show your doctor your babies body structure, heartbeat and development. Depending on the babies positioning and gestational age, you may be able to find out the sex of your baby. For more information on ultrasounds, visit

Why are ultrasounds important?

Ultrasounds are very useful in the medical field. They allow techs to view babies to make sure they are healthy and figure out how far along the mother is. They also can be used to locate other oddities such as cysts or kidney stones.

Why are renal ultrasounds performed?

Why are renal ultrasounds performed?

What are the benefits of an ultrasound?

Contrary to what most people think, ultrasounds are not just for the mothers to get to see their babies and find out the gender! Ultrasounds are a great way for doctors to see the baby as well and check for things such as fetal development. They can measure the length of bones and make sure that the baby is growing properly. They can also measure facial features which can help detect certain birth defects such as down's syndrome. It also allows them to actually see the heart beat and make sure that the heart is doing well.

What are the advantages and disadvantages of ultrasound?

you get to see your baby and know that it is ok, but iff its not you get to see your dead baby this is a disadvantage to ultrasounds, kaynat

What is the name of the people who do ultrasounds?

The folks who do ultrasounds are generally called ultrasound technicians.

Can babies see angels?

yes babies can see angels but i dont know if they can see god

Why do women use ultrasound?

Women like to have Ultrasounds to see if they are pregnant! Also if they are, They can see if their baby has any deficiencies... during fetal development

When can babies see?

babies can see and who said they didn't????? well babies can't see color when their first born;they can still see!!! its like saying their cats or dogs.

Does planned parenthood do ultrasounds?

This company will do ultrasounds. I don't think they charge you for this service. They will give you an appointment.

What is the name of people who do ultrasounds on pregnant woman?

the people who do the ultrasounds for pregnant women are called ultrsonographers.

How do babies see?


When does a babies heart start to beat?

Generally week 5, though it might not be detectable through ultrasounds at that time so no need to worry if you don't hear it right away!

Can newborn babies see?

It depends on what kind of babies your talking about. For example human babies can see when their born ,but can't see when in their mother's bellies. For another example, puppies can't see when their first born ,but eventually they can see.

When do babies see normally?

Babies can see normally because they have two eyes that work properly.

Can two week old babies see?

Yes, two week old babies can see.

What are ultrasounds used for in medicine?

most commonly for taking pictures and seeing inside a pregnant womans womb to see the fetus

Can you see baby at 5 week scan?

yes (go to this site)

Can babies see spirits?

No because babies cant see and they can not remember, but a dog can hear sounds you cannot and see the spirits of the dead

Can babies see when there newborn?


When can babies see colors?

Babies see color from the time they are newborns. There have been a lot of studies using color and watching babies' eyes track it, but the bottom line is they see the same world that we do as they enter it.

What is the name of people who do ultrasounds?


When are ultrasounds usually done for pregnancy?

Ultrasounds can be done as early as four to five weeks but are commonly done around eight weeks!