When using veterinary B-ultrasound to diagnose the female donkey, the first thing to do is to use a 3.5-6.5M Hz rectal linear array probe for livestock; the main image should be clearly visible to avoid misdiagnosis.

The steps and methods for ultrasonic diagnosis are: first clear the feces in the rectum, then apply lubricating oil to the hands and probe, and bring the probe into the rectum of the female donkey. After palpating the approximate position of the base of the uterine horn, place the veterinary B-ultrasound probe at the base of the uterine horn in a direction parallel to the longitudinal axis of the animal body, and slide from right to left or from left to right to scan. After encountering a characteristic image, freeze and save the image or record it in real time. The operation process of type A ultrasound examination is basically the same as above. Wear the probe on the index finger or middle finger, insert it into the rectum, and stick it to the uterine wall of the female donkey through the rectum for exploration, and judge whether it is pregnant or not based on the sound (not the image).

Donkey B-ultrasound machine

Judgment of veterinary B-ultrasound images: According to experience, before 20 days of pregnancy, the embryonic sac of the female donkey has a certain degree of wandering in the uterine cavity, and the position gradually becomes fixed after 20 days. According to preliminary statistics, ovulation and embryo implantation occurred on the same side in 66.7% of cases, and on the opposite side in 33.3%. Therefore, when using veterinary B-ultrasound to diagnose pregnancy in donkeys, it is generally performed 21-23 days after mating, so that the detection rate will be very high. Results of ultrasound pregnancy diagnosis: The uterine horns of non-pregnant donkeys are round, with clear boundaries from surrounding tissues; the uterine horns of pregnant donkeys are round, with clear contours, and the embryo sac in the middle, showing a liquid dark area (anechoic area). When the embryo is detected, irregularly shaped strong echo masses can be seen in the embryo sac, and sometimes its activities can be seen.

Benefits of veterinary B-ultrasound for pregnancy diagnosis of donkeys: Ultrasonic pregnancy diagnosis technology is used to diagnose early pregnancy in donkeys. It is not only accurate and intuitive, but also can advance the diagnosis time, observe the development of embryos, and promptly detect abnormal embryo development and early abortion. Although this method still does not get rid of the operation process of hand-in-rectum, its application value in diagnosing pregnancy, follicular development and ovulation identification, reproductive tract diseases, etc. is unmatched by other methods.

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