When using a sheep B-scan to examine ewes, One or several regular round or oval liquid dark areas (19-24 d of pregnancy) can be clearly displayed on the B-ultrasound display of sheep. With the continuation of gestational age, strong echoes reflected by the fetal body can be seen in the dark area, and bright fetal spots can be displayed (after 25d of pregnancy), which can be judged as pregnancy positive. No dark area or very irregular dark area on the B-ultrasonography of sheep is negative for pregnancy; There are large dark areas on the B-ultrasound of sheep and there are bright dendritic textures in the dark area, which are mostly uterine effusion. The ewes to be measured are standing on one side against the wall (or fence).

After applying the medical coupling agent with the B-ultrasound probe to the sheep, the B-ultrasound probe is vertically close to the skin of the sheep, and while observing the image displayed on the display, the sheep is slowly scanned with the B-ultrasound probe to find a clear and accurate scanning effect, so as to determine the pregnancy result. When the dark area of the bladder is detected, the exploration is to the upper left or upper right of the bladder, and the exploration can be sliding to the lower side of the bladder when the gestational age is larger.

The early pregnancy diagnosis of sheep with B-ultrasound diagnosis technology can significantly improve the detection time of sheep pregnancy. For large-scale production, the early pregnancy diagnosis of sheep with B-ultrasound can be carried out 35-45d after breeding, and the pregnancy detection accuracy rate is more than 98%. The detection method is simple, fast and intuitive, and has no high requirements on the environment and site conditions.

The early pregnancy diagnosis technology of sheep with B-ultrasound can effectively improve the reproductive efficiency and production efficiency of mutton sheep. The early pregnancy detection of mutton sheep was carried out by using the B-ultrasound diagnostic technique. At the same time, some uterine diseases, especially uterine effusion and pus caused by embryo transfer, were diagnosed and treated in time or eliminated with the help of B-ultrasound diagnostic technology, which improved reproductive efficiency.

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