title: Sonographic assessment of the first trimester fetus. A cautionary note.
abstract: Ultrasound has the potential for diagnosing fetal abnormalities in utero with a high degree of accuracy. During the first trimester, peculiarities of fetal development may suggest to the novice sonographer an abnormality where one does not exist. Similarly, particular anatomic structures may appear normal in the first trimester, yet evolve into an obvious abnormality later in gestation. For these reasons, the ultrasonic diagnosis or exclusion of a congenital anomaly in the first trimester should be made only with caution.
authors.affiliation: University of Pittsburgh Health Center, Magee-Women's Hospital, Department of Ultrasound, Pennsylvania.
authors.forename: L M
authors.initials: LM
authors.lastname: Hill
authors.forename: M L
authors.initials: ML
authors.lastname: Thomas
authors.forename: S
authors.initials: S
authors.lastname: Kislak
authors.forename: C J
authors.initials: CJ
authors.lastname: Runco
mesh_terms: D000328:Adult; D000013:Congenital Abnormalities / Q000175:diagnosis*; D003951:Diagnostic Errors; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis; D014463:Ultrasonography