What to Expect at Your Pregnancy Ultrasound Appointment

What happens during a pregnancy ultrasound

An ultrasound uses sound waves to create a picture of your baby and your uterus on a screen. You'll lie on an exam table, usually on your back, and a technician will spread warm gel on your belly. The gel helps the ultrasound wand (called a transducer) make contact with your skin and move smoothly across it. You'll see the images appear on a monitor as the technician moves the wand around, taking measurements and looking at different parts of your pregnancy.

The whole appointment usually takes 20 to 30 minutes, though it can run longer if the technician needs extra images or if your baby is in a position that makes imaging difficult. You won't feel pain — some people describe mild pressure or slight coolness from the gel. The technician may ask you to shift position, take a deep breath, or hold your breath briefly to get clearer pictures.

At the end of the appointment, a doctor reviews the images and writes a report. You may see some results right away on the screen, but the official findings go to your OB/GYN or midwife, who will discuss them with you at your next visit or by phone.

Key Takeaways

• Drink water before your appointment and avoid urinating for an hour beforehand if you're in your first trimester, because a full bladder helps the ultrasound images show up more clearly.
• Wear loose, comfortable clothing that you can easily pull up or down so the technician can access your belly without you having to undress completely.
• The technician is trained to take measurements and look for specific markers, but they cannot diagnose conditions — a doctor interprets the images and discusses any findings with you.
• Most ultrasounds are standard screening scans, but some pregnancies need specialized ultrasounds (like those for multiple babies or suspected complications) that may take longer.
• You can usually bring a partner or support person to watch the images on the screen, though some facilities limit the number of guests in the room.

When you'll have ultrasounds during pregnancy

The number and timing of ultrasounds varies depending on your pregnancy and your provider's practice. Most people have at least one ultrasound in the first trimester (weeks 8 to 13) to confirm the pregnancy, date it, and check for multiple babies. This early scan is often the most detailed look at your baby's anatomy.

A second ultrasound typically happens in the second trimester (weeks 18 to 22) and is often called the anatomy scan or mid-pregnancy scan. This is when the technician looks at your baby's organs, limbs, spine, and heart in detail. Many people find this appointment especially meaningful because the images are clearer and you can often see your baby's face or movements.

A third ultrasound in the third trimester (after week 28) checks your baby's growth, the amount of amniotic fluid, and the position of the placenta. Not all pregnancies include a third ultrasound — your provider will order one if there's a reason to monitor growth or check on something flagged in an earlier scan.

How to prepare for your ultrasound

For a first-trimester ultrasound, drink water and avoid urinating for about an hour before your appointment. A full bladder pushes your uterus up and out of the way, which gives the technician a clearer view. If you're past the first trimester, a full bladder is less critical, though some providers still recommend it.

Wear clothing that's easy to move — a shirt you can pull up and pants or a skirt you can lower. You won't need to undress completely; the technician will only need access to your belly. Leave jewelry at home or remove it before the appointment, since metal can interfere with some ultrasound equipment.

Bring your insurance card and photo ID. If this is your first ultrasound at a new facility, arrive 10 to 15 minutes early to complete any paperwork. Write down any questions you want to ask — things like your baby's position, measurements, or concerns you have — so you don't forget them during the appointment.

What the technician is looking for

In the first trimester, the technician confirms that the pregnancy is in your uterus (not ectopic), counts the number of babies, measures the baby from head to bottom to date the pregnancy, and checks the heartbeat. They also look at the placenta and amniotic fluid.

At the anatomy scan in the second trimester, the technician takes detailed measurements of your baby's head, abdomen, and thighbone to track growth. They examine the brain, spine, heart, stomach, kidneys, and limbs for any visible abnormalities. They check the position of the placenta and measure the amount of amniotic fluid. This scan can also reveal your baby's sex if you want to know.

In the third trimester, the focus shifts to growth — the technician measures your baby again to make sure they're growing at the expected rate. They check the position (head-down is ideal for vaginal delivery), look at the placenta, and measure amniotic fluid levels. If there are any concerns from earlier scans, they may look more closely at specific areas.

Understanding your ultrasound report

The technician does not diagnose conditions or give you results during the scan. They take images and measurements, and a doctor interprets them. You'll receive a written report that includes measurements, observations about your baby's anatomy, and notes about the placenta and amniotic fluid. The report goes to your OB/GYN or midwife, who reviews it and discusses the findings with you.

Most ultrasound reports use standard measurements to compare your baby's size to expected ranges for your due date. If your baby measures smaller or larger than expected, your provider may order a follow-up ultrasound or other tests to understand why. Measurements can vary by 2 to 3 weeks and still be normal, especially earlier in pregnancy.

If the technician or doctor sees something that needs further investigation — like an unusual heart rhythm, extra fluid around the brain, or a marker for a genetic condition — your provider will discuss this with you and explain what the next steps are. Not every finding means something is wrong; many require only monitoring or a specialized ultrasound for a clearer picture.

Specialized ultrasounds and when you might need one

Some pregnancies need ultrasounds beyond the standard screening scans. If you're carrying twins or multiples, you'll have more frequent ultrasounds to monitor each baby's growth and check for complications specific to multiple pregnancies. If you have a history of miscarriage, bleeding, or other complications, your provider may order extra scans to monitor your pregnancy closely.

A fetal echocardiogram is a specialized ultrasound that looks in detail at your baby's heart. It's ordered if a standard ultrasound shows a possible heart abnormality, if you have a family history of heart disease, or if you have diabetes or another condition that increases heart risk. This scan takes longer and is usually done by a specialist.

A detailed anatomy scan or level II ultrasound is a longer, more thorough version of the standard anatomy scan. It's ordered if the first scan was unclear, if there's a concern that needs closer examination, or if you're at higher risk for certain conditions. These scans can take 45 minutes to an hour.

What to do if you're anxious about your ultrasound

It's normal to feel nervous before an ultrasound, especially if you've had complications or losses before, or if you're waiting to hear about a concern flagged in an earlier scan. Tell the technician or your provider if you're anxious — they can explain what they're looking for and answer questions as they go.

Bring a partner or trusted person with you if that helps you feel more grounded. Some people find it reassuring to see the images on the screen and hear the technician describe what they're looking at. Others prefer to wait for the doctor's report. Both approaches are fine.

Remember that the technician is trained to look for specific markers and measurements, not to diagnose. If they see something unusual, they'll note it in the report, but the doctor is the one who interprets what it means and what happens next. You don't have to make any decisions during the appointment itself.

Frequently Asked Questions

Can my partner come to the ultrasound with me?

Most facilities allow one support person in the room during the ultrasound. Call ahead to confirm the policy at your specific clinic. Some places limit guests during certain times or have restrictions based on current health guidelines, so it's worth asking when you schedule.

Will the ultrasound tell me if something is wrong with my baby?

An ultrasound can show some conditions, but not all. It's a screening tool, not a diagnostic test. If the technician or doctor sees something that needs investigation, they'll explain what it is and what the next steps are — which might include a specialized ultrasound, blood work, or monitoring. Many findings turn out to be nothing serious.

What if my baby won't cooperate and the technician can't get all the images?

Babies don't always cooperate. If your baby is in an awkward position or won't move, the technician may ask you to walk around, change positions, or come back another day to try again. Sometimes a follow-up scan is scheduled to get the images that were missed. This is common and doesn't mean anything is wrong.

Can I find out my baby's sex at the ultrasound?

Sex can usually be determined starting around 18 to 20 weeks, though accuracy depends on your baby's position and the technician's skill. If you want to know, tell the technician at the beginning of the appointment. If you don't want to know, let them know that too — they'll avoid looking at or mentioning that area.

How long does it take to get the results?

The technician usually gives you images or a printed report before you leave. The official report from the doctor typically reaches your OB/GYN or midwife within a few days. Your provider will contact you if there are any findings that need discussion, or you can ask about results at your next appointment.