At what gestational age do most healthcare providers recommend the first ultrasound for fetal anatomy assessment?

The first ultrasound for fetal anatomy assessment is typically recommended between 18 to 20 weeks of gestation. This timeframe is crucial because it is during this period that the baby's anatomy can be sufficiently visualized and assessed for normal development.

At 18 to 20 weeks, the fetal organs and structures are more developed, making it possible to identify and evaluate potential congenital anomalies. This ultrasound, often referred to as the anatomy scan or detailed ultrasound, allows healthcare providers to assess the fetal anatomy, measure growth, determine amniotic fluid levels, and check placental position.

Earlier scans, such as those conducted at 6-8 weeks or 10-12 weeks, are generally focused on initial viability, dating the pregnancy, and assessing the presence of a heartbeat rather than detailed anatomical evaluation. Scans performed later than 20 weeks may still provide valuable information, but they are typically not the standard for initial anatomy assessment. For these reasons, the 18-20 week timeframe is established as the optimal period for the first ultrasound dedicated to fetal anatomy evaluation.