Abstract
This study evaluated colour-Doppler ultrasound imaging (UI) as a substitute for laparoscopy to count the corpora lutea (CL) in superovulated sheep. Twenty-five Santa Ines ewes were superovulated three times at 21-day intervals. Corpora lutea were counted by colour-Doppler UI (CLDOPPLER ) 6days after each superovulation and confirmed by laparoscopy (CLLAP ) 12hr later. The mean number of CL was similar for both techniques (2.1±2.5 vs. 2.1±2.7 for CLDOPPLER and CLLAP , respectively) with a significant positive correlation (r=.94; r2 =.89). Colour-Doppler UI effectively evaluated the ovarian response in superovulated ewes and efficiently identified animals that did not respond to superovulation.
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