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 Online Journal of Veterinary Research 

Volume 25 (6): 394-400, 2021.

Pregnancy toxemia in ewes and misdiagnosis by ultrasonography.


Alidadi N, Rafia S and Moaddab SH.


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




Alidadi N, Rafia S, Moaddab SH., Pregnancy toxemia in ewes and misdiagnosis by ultrasonography, Onl J Vetr Res., 25 (6): 394-407, 2021. Four recumbent ewes with nervous depression were diagnosed as non-pregnant by transabdominal ultrasonography. The ewes had been separated from pregnant ones ~4 months before and thus given low energy diet. However, we then detected late twin pregnancy by abdominal palpation and confirmed pregnancy toxemia by epidemiological, clinical, necropsy, biochemical and histopathological findings. We then found that 8 more ewes that had been also diagnosed as non-pregnant subsequently found pregnant suggesting significant human error. Diagnosis of pregnancy in ewes by ultrasonography usually has a high rate of accuracy (95-98%), but as highlighted in this case report, it is strongly subject to technician experience and authors recommend repeat scans of non-pregnant ewes.


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