1996-2021. All Rights Reserved. Online Journal of Veterinary Research. You may not store these pages in any form except for your own personal use. All other usage or distribution is illegal under international copyright treaties. Permission to use any of these pages in any other way besides the before mentioned must be gained in writing from the publisher. This article is exclusively copyrighted in its entirety to OJVR. This article may be copied once but may not be, reproduced or re-transmitted without the express permission of the editors. This journal satisfies the refereeing requirements (DEST) for the Higher Education Research Data Collection (Australia). Linking: To link to this page or any pages linking to this page you must link directly to this page only here rather than put up your own page


Online Journal of Veterinary Research

Volume (9):935-941, 2019.

Outbreak of primary pregnancy toxemia in ewes due to misdiagnosis of pregnancy by ultrasonography.


Alidadi N, DVM DVSc, Rafia S and Moaddab SH, DVM.


Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.




Alidadi N, Rafia S, Moaddab SH., Outbreak of primary pregnancy toxemia in ewes due to misdiagnosis of pregnancy by ultrasonography, Onl J Vet Res., (9):935-941, 2019. Four referred ewes were examined for recumbency and depressive nervous signs. Recognized as non-pregnant by transabdominal ultrasonography, the ewes had been separated from pregnant ones ~4 months before and put on a low energy diet. However, late twin pregnancy was detected on abdominal palpation. Pregnancy toxemia was confirmed by epidemiology, clinical findings, necropsy, biochemistry and histopathology. Eight more ewes in the non-pregnant flock were consequently mis-diagnosed. Diagnosis of pregnancy in ewes by ultrasonography is a useful tool in reducing the costs of sheep rearing and usually has a high rate of accuracy (95-98%). However as highlighted in this case report subject to technician experience and authors recommend a repeat scan or follow up of non-pregnant ewes.


Key words: Ewe, Pregnancy Toxemia, Outbreak, Pregnancy Diagnosis, Ultrasonography.