There is something unforgettable about seeing your baby on a screen for the first time. That flicker of a heartbeat, the tiny curled fingers, the first glimpse of a face, these moments make ultrasounds one of the most meaningful parts of pregnancy. But beyond the excitement, each OB ultrasound plays an important medical role, giving your doctor the information needed to guide a healthy pregnancy.

At A.T. Radiology, we are proud to support expecting families with imaging that is accurate, comfortable, and reassuring. If you are wondering what happens at each stage of pregnancy, here is a simple guide to what to expect at every appointment.

Key Takeaways

• OB ultrasounds are recommended at different points in pregnancy, each with a specific purpose.
• Early scans confirm viability and estimate your due date, while later scans check anatomy and growth.
• The second trimester anatomy scan offers the most detailed look at your baby’s development.
• Regular imaging helps your care team catch potential concerns early, when there is the most time to act.

First Trimester (Weeks 1-13)

Your first ultrasound often confirms the pregnancy and checks for a healthy heartbeat. It can also help estimate your due date and confirm whether you are expecting one baby or more.

This scan is usually performed transvaginally in early weeks, since the baby is still very small. It may feel unfamiliar, but it is quick and gives your care team valuable early information.

What it helps detect: pregnancy viability, gestational age, and early signs of multiples.

Second Trimester (Weeks 14-27)

This is often the appointment parents look forward to most. Around 18 to 22 weeks, the anatomy scan takes a detailed look at your baby’s organs, spine, brain, and limbs. It is also when many families learn the baby’s sex, if they choose to.

What it helps detect: structural development, placenta position, and amniotic fluid levels. This scan plays a key role in identifying any concerns early, when there is the most time to plan and prepare.

Third Trimester (Weeks 28-40)

Later ultrasounds check your baby’s growth and position. Your doctor may order one to see how big your baby is, confirm that your baby is head-down before delivery, or check amniotic fluid levels if needed.

What it helps detect: growth, delivery positioning, and overall well-being as your due date nears.

The Bigger Picture Behind Every Scan

Each ultrasound tells a story of how your baby is growing and thriving. It shows your OB how your pregnancy is progressing and helps catch anything unexpected early. Better imaging means better guidance, and better guidance means a calmer pregnancy.

If anything on your scan needs a closer look, your doctor may request a follow-up ultrasound. This is common and gives your care team the clearest possible picture, so there is no need to worry if this happens.

What to Expect at Your Appointment

• Bring a partner or support person if you would like company.
• Wear comfortable, loose clothing.
• For early scans, a full bladder may be requested to improve image quality.
• Most appointments take 20 to 45 minutes, depending on the type of scan.
• Our technologists will explain what they are looking at, though your OB will review full results with you.

Trusted, Local Care

Families trust A.T. Radiology for compassionate, accurate OB ultrasound imaging. Our team understands this is more than a medical appointment. It is a chance to connect with your baby and feel reassured every step of the way.

If your doctor has recommended an OB ultrasound, contact us to schedule your appointment. We are here to support you and your growing family with care you can trust.

Our imaging services include: 3D Mammogram, Ultrasounds, Sonograms, X-Rays, MRI Scans, 3D Sonogram, Echocardiograms, Prostate MRI, Bone Density Scan, Arthrograms, CT Low-Dose Lung Cancer Screening, Lung Cancer Screening, CT Scan, and OB Ultrasound.