Screening Ultrasound – 2nd Trimester (18–22 Weeks)

The second-trimester screening ultrasound is one of the most critical examinations performed during pregnancy. Typically conducted between weeks 18 and 22, this scan allows for a detailed evaluation of fetal organ systems and structures, as well as the overall progression of the pregnancy.

This procedure is routinely referred to as the “anatomy scan” or “anomaly scan,” because during the session, the specialist systematically evaluates the primary organs and structural integrity of the fetus to detect potential variations early.

What Is Evaluated During the Examination?

During the anatomy screening, the specialist systematically reviews:

• Fetal brain structure and intracranial anatomy
• Cardiac anatomy and the outflow tracts of the great vessels
• Kidneys and the urinary tract
• Spinal alignment and structural integrity
• Upper and lower extremities (limbs)
• Facial structures and cranial profiles
• Placental location, positioning, and health
• Amniotic fluid volume
• Fetal growth metrics and biometric alignment with gestational age

The ultrasound also evaluates fetal presentation (positioning) and other critical physiological markers essential for coordinating your remaining prenatal care.

Why Is the 18–22 Week Screening So Critical?

The second-trimester screening is a pivotal milestone in prenatal care. By this stage of gestation, the major fetal organ systems are sufficiently developed to allow for a comprehensive structural review, providing the clearest and most detailed overview of your baby’s growth. The gathered data helps your obstetrician assess the overall course of the pregnancy and timely plan additional monitoring or diagnostics if indicated.

How Is the Examination Conducted?

The scan is performed using an advanced diagnostic ultrasound system and is completely safe for both the mother and the fetus.

• Duration: 30–40 minutes.
• Note: The duration of the session may vary slightly depending on the live positioning of the fetus and the specific structural parameters being visualized.
• Preparation: No special preparation is required.

Frequently Asked Questions

• In which week of pregnancy should the second screening be performed? The optimal window for this anatomical evaluation is between weeks 18 and 22 of pregnancy.
• Does this scan evaluate every single fetal organ? The ultrasound thoroughly reviews all primary organs and systems; however, the visibility and extent of the evaluation can depend heavily on fetal positioning and specific maternal characteristics during the scan.
• Can the baby’s sex be determined during this examination? In most cases, yes. The second-trimester ultrasound can identify fetal sex, provided that the baby is in a favorable position to offer a clear view.
• Is this diagnostic procedure safe? Yes, absolutely. Diagnostic ultrasound is a completely non-invasive, safe, and universally standard method used throughout all stages of pregnancy.

Book Your Screening 

The second-trimester screening ultrasound is a vital opportunity to ensure your baby’s development is progressing normally and under expert clinical control. Book your anatomy scan at VitaMed Medical Center today to receive a professional evaluation during this essential stage of your pregnancy.

Doctors