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Semin Reprod Med 2008; 26(5): 373-382
DOI: 10.1055/s-0028-1087103
© Thieme Medical Publishers

Ultrasound Criteria for Diagnosis of Early Pregnancy Failure and Ectopic Pregnancy

Lisa Perriera1 , 3 , Matthew F. Reeves2 , 3
  • 1Clinical Instructor, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
  • 2Assistant Professor, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
  • 3Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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Publication History

Publication Date:
29 September 2008 (online)

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ABSTRACT

Early pregnancy failure and ectopic pregnancy are common clinical diagnoses for which ultrasound can provide useful information. This review explores the use of ultrasound to diagnose early pregnancy failure and ectopic pregnancy. By documenting the developmental milestones of early normal pregnancy using ultrasound, clinicians can distinguish normal from abnormal intrauterine pregnancies. An early pregnancy failure can be diagnosed by the absence of a visible yolk sac with a mean sac diameter of 13 mm; the absence of a visible embryo with a mean sac diameter of 13 mm; the absence of cardiac motion with an embryo measuring 5 mm or more in maximal length; or the presence of an empty amnion. In most settings, documentation of a normal intrauterine pregnancy effectively eliminates the possibility of ectopic pregnancy. The presence of an adnexal mass in the absence of an intrauterine gestational sac may indicate an ectopic pregnancy.

KEYWORDS

Transvaginal ultrasound - early pregnancy failure - ectopic pregnancy

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Matthew F ReevesM.D. M.P.H. 

Department of Obstetrics, Gynecology, and Reproductive Sciences

300 Halket Street, Pittsburgh, PA 15213-3180

Email: mreeves@upmc.edu

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