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Failed Intrauterine Pregnancy: What Is a Failed Pregnancy, What Is Not?

CANAVAN, TIMOTHY P. MD, MSc

Clinical Obstetrics and Gynecology: September 2017 - Volume 60 - Issue 3 - p 562–574
doi: 10.1097/GRF.0000000000000301
Advances in Ultrasound and Obstetrical Imaging

Pregnancy failure is defined as a lack of sonographic evidence of current or expected viability. Technologic advances in ultrasound imaging continue to redefine diagnostic criteria of pregnancy failure or success. When evaluating a pregnancy, the first step is an assessment of maternal risk factors for failure. Imaging clues such as an empty gestational sac measuring ≥25 mm or an embryo ≥7 mm without cardiac activity are reliable signs of pregnancy failure, whereas embryonic growth <1 mm/d is not. Combinations of sonographic findings can be used for a more accurate prediction of pregnancy success or failure.

Division of Ultrasound, Magee Womens Hospital, University of Pittsburgh, Pittsburgh, Pennsylvania

The author declares that there is nothing to disclose.

Correspondence: Timothy P. Canavan, MD, MSc, Division of Ultrasound, Magee Womens Hospital, University of Pittsburgh, Pittsburgh, PA. E-mail: canavant@mail.magee.edu

Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.