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First-trimester ultrasound: the essentials
R Sohaey1, P Woodward, W J Zwiebel
1Department of Radiology, University of Utah School of Medicine, Salt Lake City 84132, USA.
Seminars in Ultrasound, CT, and MR
|February 1, 1996
Abstract:
A review of first-trimester ultrasound findings is presented. The normal first trimester, including practical embryology and pregnancy dating, is first discussed. Abnormal first-trimester findings, including sonographic evaluation of the failing pregnancy, ectopic pregnancy, gestational trophoblastic disease, and first-trimester cystic hygroma, are then stressed. This report reviews the spectrum of findings encountered by sonographers while evaluating early pregnancy.