For the diagnosis operation of the veterinary B-ultrasound machine, place the sheep B-type ultrasound diagnostic instrument outside the sheep pen to be examined, lay it flat, turn on the power, and adjust the parameters until the image is clear.

When performing the first veterinary B-ultrasound machine examination of the sheep, apply coupling agent to the probe according to the best sound and image adjustment, hold the sheep's tail with the left hand, hold the probe with the right hand and slowly and gently insert it into the sheep's rectum. Note that the ultrasound working surface of the veterinary B-ultrasound machine probe is facing down (uterine side).

Gently insert the veterinary B-ultrasound machine probe to obtain a clear, easy-to-read and recognizable image. For unclear or unrecognizable images, you can gently lift the sheep's posterior abdomen to facilitate imaging. When there are many fecal balls in the sheep's rectum that affect the entry of the veterinary B-ultrasound machine probe or the image quality, take out the fecal balls first and then conduct the examination.

Veterinary B-ultrasound machine examination generally uses the bladder as a positioning mark, but when there is less urine in the bladder, positioning is more difficult, and sometimes even a small amount of urine in the bladder is mistaken for a gestational sac. Until the bladder can be seen on the veterinary B-ultrasound machine monitor, the bladder is used as a reference point. The uterine horn is slightly forward, and the probe is moved forward and backward and rotated clockwise or counterclockwise to obtain a complete image of the reproductive tube.

The correct reading of the veterinary B-ultrasound machine image, in addition to the judgment while operating, generally requires a consultation with a staff member with image reading experience to avoid false negatives.

After the ewes reach 60 days of pregnancy, the fetus becomes heavier and is located in the lower abdomen. Therefore, it is necessary to push the abdomen in front of the hind legs to bring the uterus into the effective range of the veterinary B-ultrasound machine probe. The fecal balls in the rectum of the recipient sheep can bring the influence of acoustic shadows, but this can be excluded during the operation. Abdominal inflammation, uterine malformation, endometritis, uterine adenoma, fibroids, etc. caused by surgery may be misjudged as pregnancy at different stages or affect the diagnosis.