[Optimization of embryo transfer programs in ewes by transrectal ultrasonographic ovary diagnosis (B-mode) in...

The aim of this study was to check the accuracy of transrectal ultrasonography for the ovary diagnosis in superovulated sheep during the estrus (n = 10) and on the day 8 after estrus (n = 10). The results were checked by laparoscopic ovary diagnosis. The real-time ultrasound unit CS-9100 OCULUS was used with a linear 7.5 MHz rectal probe. Transrectal ultrasonography was performed at sheep lying in their dorsal position. In 90% of the sheep it was possible to find both ovaries during the estrus and in 60% on the 8th day of the estrus cycle. Correlation for the number of follicle (diameter > or = 4 mm) per ovary during the estrus counted at ultrasonography and laparoscopy were 0.62 (p < 0.05) and for the number of corpora lutea per ovary on day 8 after estrus 0.97 (p < 0.05). The results suggest, that the ultrasonographic ovary diagnosis is an appropriate method to check the results of superovulation in embryo transfer programs. Non-responding or poorly responding donors can be selected.