How Many Times Do You Get An Ultrasound During Pregnancy?

Most pregnant people in the United States get two ultrasounds during a typical pregnancy. One is usually done in the first trimester, between 11 and 14 weeks. The second is the anatomy scan, typically performed between 18 and 22 weeks. This is the standard recommendation from the American College of Obstetricians and Gynecologists. But the real number can vary based on your health, your baby’s health, and your doctor’s preferences. Some people get more. Some get fewer. Here is what the evidence actually says.

How Many Times Do You Get An Ultrasound During Pregnancy in a Low-Risk Pregnancy?

For a healthy pregnancy with no complications, the standard is two ultrasounds. The first is often called the dating scan. It confirms your due date, checks for a heartbeat, and looks for the number of babies. The second is the anatomy scan. This is a detailed check of the baby’s organs, bones, and growth.

Some doctors also do a quick ultrasound at your first prenatal visit just to confirm the pregnancy. This is not always considered a full ultrasound. It is often a brief check with a handheld device. The CDC does not count this as a standard ultrasound in their guidelines. But many women experience it.

If you have no risk factors, you likely will not get more than these two. The American College of Obstetricians and Gynecologists says more ultrasounds do not improve outcomes in low-risk pregnancies. So extra scans are not recommended unless there is a medical reason.

What Factors Can Increase the Number of Ultrasounds?

Several conditions can lead to more frequent ultrasounds. If you have high blood pressure, diabetes, or a history of preterm birth, your doctor may want more monitoring. The same is true if you are carrying twins or more. Multiple pregnancies almost always require additional scans to track growth and check for complications.

Other reasons include concerns about the baby’s growth. If your fundal height measurement is off, your doctor may order an ultrasound to check. If you have bleeding or pain during pregnancy, that can also trigger extra scans. Placenta position issues, like placenta previa, need follow-up scans later in pregnancy.

Some women get an ultrasound because they cannot remember their last menstrual period. This helps date the pregnancy more accurately. If the first trimester screen shows a higher risk for chromosomal conditions, a follow-up ultrasound may be needed. In all these cases, the extra scans serve a clear medical purpose.

What Does the Research Say About Ultrasound Frequency?

Research published in the Journal of the American Medical Association found that routine third-trimester ultrasounds in low-risk pregnancies do not improve outcomes. The study followed thousands of women. Those who got an extra scan did not have healthier babies or fewer complications. The conclusion was clear: more is not better when there is no medical reason.

The Cochrane Review, a respected source of medical evidence, has examined ultrasound use in pregnancy. They found that routine early ultrasounds reduce the need for induction and improve detection of multiple pregnancies. But they also noted that the benefits of additional scans beyond the standard two are not well supported by evidence.

Some studies suggest that frequent ultrasounds may cause unnecessary anxiety. If a scan shows a minor finding that later resolves, it can lead to more tests and worry. This is called overdiagnosis. It is a real concern in modern obstetrics. The goal is to use ultrasound only when it will change management or provide clear benefit.

What Are the Different Types of Pregnancy Ultrasounds?

There are two main types of ultrasound used in pregnancy. The first is transvaginal ultrasound. This is common in early pregnancy, usually before 10 weeks. A small probe is placed in the vagina to get a clearer image of the uterus and ovaries. It is safe and not painful.

The second is transabdominal ultrasound. This is what most people imagine. A gel is applied to the belly, and a wand is moved across the skin. It is used for the dating scan, anatomy scan, and any later checks. Both types use sound waves, not radiation. They are considered safe when used appropriately.

There are also specialized ultrasounds. A Doppler ultrasound checks blood flow in the umbilical cord or baby’s heart. A 3D or 4D ultrasound creates a more detailed image of the baby’s face or body. These are not part of standard care. They are sometimes used for medical reasons, but also offered by private clinics for keepsake images. The FDA warns against using ultrasound for non-medical purposes.

What to Avoid: Non-Medical Ultrasound and Keepsake Scans

Private ultrasound studios offer 3D and 4D images for parents who want a sneak peek. These are not medically necessary. The FDA has issued warnings about them. Ultrasound can heat tissues slightly, and the long-term effects of repeated exposure are not fully known. While no harm has been proven, the principle is to use ultrasound only when there is a medical reason.

Some people believe that more ultrasounds mean a healthier pregnancy. That is not supported by evidence. In fact, the American Institute of Ultrasound in Medicine advises against using ultrasound for entertainment. They recommend limiting exposure to what is medically needed.

If you are considering a keepsake scan, talk to your doctor first. They can explain the risks and help you decide. Most obstetricians will tell you it is not necessary. The standard two scans provide all the information needed for a healthy pregnancy in most cases.

How to Prepare for Your Pregnancy Ultrasound

For the dating scan in the first trimester, you may need a full bladder. This pushes the uterus up and makes it easier to see. Your doctor will tell you to drink water and not empty your bladder before the scan. For later scans, a full bladder is usually not needed.

Wear comfortable, loose clothing. You will need to expose your belly for the transabdominal scan. The gel is warm but can feel cold at first. The scan itself is painless. It takes about 20 to 30 minutes for a standard anatomy scan. You may be asked to move or hold your breath to get better images.

Ask questions during the scan. The technician may not be able to tell you results right away. The images are reviewed by a radiologist or your doctor. You will get the results at your next appointment or sometimes sooner. Do not worry if the technician is quiet. They are focused on getting good images.

Common Misconceptions About Pregnancy Ultrasound Frequency

One common myth is that you need an ultrasound at every prenatal visit. This is not true. In many countries, including the United States, standard care does not include routine ultrasounds at every visit. Your doctor listens to the baby’s heartbeat with a Doppler device, which uses sound but does not produce an image. That is not the same as an ultrasound.

Another myth is that ultrasound can detect every problem. It cannot. Some conditions, like certain heart defects or genetic disorders, may not be visible. The anatomy scan is thorough but not perfect. If something is missed, it does not mean the technician or doctor made a mistake. It is a limitation of the technology.

Some people think that 3D or 4D ultrasounds are better than standard 2D scans. They are not. The standard 2D scan provides the most useful medical information. 3D and 4D images are reconstructions that look more lifelike, but they do not show internal structures as clearly. They are for visual appeal, not diagnostic accuracy.