Chandrashekara Murthy, V.Krishanaswamy, A.Honnappa, T.G.Bhaskaran, R.Girish KumarStanzin Thakchos2016-11-142016-11-142011-06-15http://krishikosh.egranth.ac.in/handle/1/85436Pg. ThesisThe present study was conducted to detect the pregnancy by using B-mode real time ultrasound using 3.5 and 5 MHz probe by transabdominal method on twenty Bannur ewes maintained at Department of Instructional Livestock Farm Complex and ten pregnant ewes presented for the pregnancy diagnosis at the Department of Gynaecology and Obstetrics, Veterinary College Bangalore, were used for the present study. The objective of the study was to determine the earliest day at which pregnancy could be detected and describe the chronological characteristics of pregnancy from Day 25 to Day 60 of gestation. The present study revealed that the pregnancy could be detected at 25 days after mating by detection of gestational sac with 23.3 percent accuracy. The foetal heartbeat and placentomes were detected with 100 percent accuracy from 45 to 50 days of gestation. Further, leg buds and vertebral column were seen in all the ewes at 55 to 60 days of gestation. It is concluded that pregnancy diagnosis in sheep with 100 percent accuracy can be accomplished between 40 to 50 days post mating using transabdominal ultrasonography.enB-mode, transabdominal ultrasonography, gestational sac, placentomes, foetal heartbeat, leg buds, vertebral columnThesis