Characteristics of the image of the follicles of black goats observed by B-ultrasound machine

The image of the follicles is black (no echo). The wall of the follicle is strongly echogenic (the image is bright area), and the boundary between the follicle wall and the ovary is clear. In the ultrasound image, the entire follicle is irregular in shape. The image of the blood body is a dark area with mixed reticular strong echoes. The corpus luteum is highly echogenic, and a few parts have a hollow low echo area in the middle. The ultrasound images of the follicles and blood bodies are consistent with those reported in the literature. ", the hollow low-echo area in the middle of the sheep corpus luteum (with corpus luteum) was occasionally found in this experiment, which is very different from the proportion of corpus luteum with cavities in cattle reported by Kastelic, which is as high as 79%. This situation of sheep corpus luteum has not been reported at home and abroad. The reason for this difference may be that the eggs and follicles of sheep are relatively small compared with those of cattle, and most of them cannot form a clear cavity after ovulation. Or the diameter of the formed cavity is less than the detectable length of 2mm by B-ultrasound.

Sheep B-ultrasound image

B-ultrasound machine observes the ovulation process of black goats

Ultrasound tracking scan is used after the sheep is in estrus. When it is found that the ovulation size is reached (the diameter is about 5-- on the sheep), the ovulation size is reached. 7ram) follicles disappear, it is determined to be ovulation, but the experiment found that follicles with a diameter of 4mm to 5mm also ovulated, accounting for about 26.1% (35/134) of the total ovulation number, which is smaller than the ovulation follicles reported in the data. This may also be the population characteristic of Taizu black goats with a large number of ovulations and relatively small follicles formed over a long period of time. After 3-5 days, CL can be detected by ultrasound scanning to prove that ovulation has occurred. The average detection of CL is 3 days after ovulation. Through the monitoring of the ovulation process, it is confirmed that goats generally ovulate between 12-24 hours after estrus, and form a corpus luteum about 3 days after ovulation. It is consistent with the data reported.