The anatomy ultrasound

A detailed look at your baby's development

The anatomy scan is usually performed at 18 to 22 weeks. It examines the baby's brain, spine, heart, abdomen, limbs, and other visible structures. The team also checks growth measurements, the placenta, and amniotic fluid. This is a medical assessment, even when you also get to see your baby's face or learn the baby's sex. ACOG screening information

Why another ultrasound may be recommended

Sometimes the baby's position prevents complete views. Body tissue, fluid levels, and pregnancy timing can also affect images. A repeat scan often means the team needs a better look; it does not automatically mean an abnormality was found.

Additional scans may be needed to follow growth, recheck placental position, or investigate a specific concern. The schedule depends on the finding and your pregnancy history. ACOG ultrasound information

Understand the limits

Ultrasound uses sound waves rather than X-rays. A normal scan is reassuring, but it cannot rule out every structural condition, genetic disorder, or later developmental problem. Some conditions are too small to see or only become apparent later.

If a finding needs follow-up, ask what is known, what remains uncertain, and which test could help. Depending on the finding, the next step may be specialist ultrasound, genetic counseling, diagnostic testing, or a fetal echocardiogram.