Pregnancy diagnosis' was carried out on 43 Merino ewes by means of Doppler-mode ultrasound (Preg-tone) after 35, 60, 75, 90, 105 and 120 th days of AI.

In the first examinations (35 th days) of the animals they were restrained in dorsal recumbency and transducer probe was placed on the hairless area öf the ventral abdominal wall just in front of the udder. In the further examinations, ewes were restrained in the standing position and the transducer probe was applied to the hairless region of the skin which lie ventro medially to the pre-crural skin fold just below the right flank.

Results were compared with lambing records. Accuracy rates for pregnant ewes on 35, 60, 75, 80 105 and 120 th days were 14, 33, 56, 77, 95, and 100 % respectively.