When conducting internal examinations on ewes using B-ultrasound, the bladder is generally used as a positioning marker. However, when there is less urine in the bladder, positioning becomes more difficult, and sometimes a small amount of urine in the bladder may be mistaken for a gestational sac. But the bladder can be seen on the monitor using B-ultrasound in animals, and the bladder serves as a reference point. The position of the uterine horn is slightly forward, and the animal uses a B-ultrasound probe to obtain a complete image of the reproductive tract by moving back and forth and rotating clockwise or counterclockwise. The correct reading of animal B-ultrasound images requires not only operation and judgment, but also consultation with an experienced reader to avoid false negatives. After reaching 60 days of pregnancy, the fetus becomes heavier and is located in the lower abdomen. Therefore, it is necessary to push the abdomen in the front direction of the hind legs to allow the uterus of the ewe to enter the effective range of the Animal ultrasound probe.

Animal B-ultrasound machine

At 80 days (12 weeks) of gestation, a complete fetal ultrasound can be seen in pregnant ewes. Early diagnosis using Veterinary Ultrasound also requires an echocardiogram of the ovaries to assist in the diagnosis. The ovaries are slightly enlarged and a circular hypoechoic area can be seen inside, which is the corpus luteum of pregnancy (normal ovaries generally show homogeneous low to medium echogenicity, follicles appear small and circular with no echo, and the medulla is located in the middle and shows irregular slightly strong echo).

When using animal B-ultrasound to detect ewes, the presence of fecal pellets in the ewe's rectum can cause acoustic effects, but this can be ruled out during the operational examination of ewes using animal B-ultrasound. Abdominal inflammation, uterine malformations, endometritis, uterine adenomas, fibroids, etc. caused by surgery may be misdiagnosed as different stages of pregnancy or affect diagnosis.

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