During which trimester is the anatomy scan typically performed?

The anatomy scan is typically performed during the second trimester, specifically between 18 and 22 weeks of gestation. This imaging study is crucial for assessing fetal development and understanding the anatomical structures present. By this stage of pregnancy, most organs and systems are sufficiently developed to be visualized clearly via ultrasound, allowing for the evaluation of fetal growth, the detection of congenital anomalies, and the assessment of placental position and amniotic fluid levels.

Performing the anatomy scan in the second trimester provides the best opportunity to collect comprehensive and accurate information about the fetus. In the first trimester, while preliminary assessments can be made, developmental details are often not yet sufficiently clear, limiting the ability to conduct a thorough examination. The third trimester focuses more on monitoring fetal well-being and preparing for delivery rather than detailed anatomical assessment. Therefore, the second trimester is the ideal time for the anatomy scan to ensure accurate and effective evaluation.