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The aim of the present study was to test transrectal real-time B-mode ultrasonography for pregnancy diagnosis in ewes from the Ile de France breed on day 16, 23 and 30 after fixed-time artificial insemination. The experiment was carried out with 22 multiparous pure-bred Ile de France ewes aged 2–5 years. Diagnosis of pregnancy was based on the presence of enlarged uterine lumen with amniotic fluid and visualisation of embryo. The accuracy (Ac %), sensitivity (Se %) and specificity (Sp %) of the technique were determined. The gestational phase influenced significantly (P<0.01) the accuracy of the transrectal ultrasonography approach for pregnancy diagnosis. At day 16 the accuracy was 50.0%, whereas at day 23 and at day 30 it reached 72.73% and 90.91% respectively.

Efficiency of transrectal ultrasonography for pregnancy diagnosis of Ile de France ewes during the first month of gestation