Ultrasound is, arguably, the most commonly used diagnostic procedure in obstetrics. It is
convenient, painless, yields immediate, extensive results, and is widely considered to be
safe. Some (but not all) benefits described in the literature have been validated by evidence-
based analysis, such as pregnancy dating. Others are considered clinically useful, although
objective evidence may be less strong. As is the case with almost any medical procedure,
however, its performance carries some risks: misdiagnosis on the one hand and possible …