Pregnancy ultrasound is an imaging examination that uses sound waves to visualize the fetus, placenta and surrounding structures throughout pregnancy. It monitors the baby’s growth, checks proper development, and screens for potential structural abnormalities. 3D and 4D imaging additionally provides a three-dimensional, even animated, image of the baby’s face and movements.
What Is Pregnancy Ultrasound?
How the Examination Works
The ultrasound is performed abdominally, sometimes supplemented by a transvaginal approach in early pregnancy for greater precision. Every ultrasound is accompanied by a detailed report, explained to the patient during the consultation.
Pregnancy Monitoring Ultrasounds
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First-Trimester Ultrasound
Performed between 11 and 14 weeks of pregnancy, it assesses gestational dating, embryonic viability and certain screening markers.
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Morphology Ultrasound
Performed around 22 weeks of pregnancy, it provides a detailed examination of fetal anatomy.
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Third-Trimester Ultrasound
Assesses fetal growth, position and well-being in late pregnancy.
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3D/4D Ultrasound
Three-dimensional imaging, either static (3D) or animated (4D), which complements medical monitoring with a more detailed view of the baby's face and movements.
After the Examination
Pregnancy ultrasound is a non-invasive, painless examination, with no contraindications or special preparation required. Depending on the findings, closer monitoring or additional tests may be recommended.
Frequently Asked Questions
Three ultrasounds are generally recommended during a normal pregnancy (first-trimester, morphology, third-trimester); this schedule may be adjusted depending on the situation.
No, 3D/4D imaging is a complement primarily for visual purposes; medical monitoring relies on standard screening ultrasounds (2D).
It is generally offered between 28 and 32 weeks of pregnancy, a period when facial features are well formed and there is still enough room for good visualization.
No, it can screen for many abnormalities but cannot detect all of them with certainty; results are interpreted within the overall context of pregnancy monitoring.