External observation method
Observe the external performance and mental status of cattle and sheep, and determine whether they are in heat and heat. The estrus of female stocks often manifests itself as uneasiness, love moving around, loss of appetite, or even refusal to eat. The genital area is swollen and swollen with mucus out of the genitals and is sensitive to the reaction of the surrounding environment or male animals.
2. Test method
Judging from the closeness of female behavior when approaching a male animal, if the female animal wishes to approach the male animal, bow the back of the bow, open the hind limbs, frequently urinate, and have a match to act as an estrus, and if the estrus does not occur or after the estrus is over, The performance is far from the male, and when forced to pull close, there are often evasive behaviors and even kicks, bites, and other resistance behaviors.
At trial, the vets chose a physique, a strong libido, and a non-destructive veterinarian to put on a cloth for the trial.
3. Vaginal examination
Using a vaginal opener, observe the color and congestion of the vaginal mucosa, the open state of the cervix, the size of the cervix opening, and the color, secretion, and viscosity of the mucus to determine the degree of oestrus. Inspection instruments must be sterilized and inserted with care so as not to damage the vaginal wall.
Vaginal congestiveness has a certain relationship with ovulation. Changes in the openness of the cervix can be used as a good basis for judgment, and smear crystallization of mucus can also be used.
4. Rectal examination
The arm was extended into the rectum of the dam. The changes in the ovaries and follicles were touched with fingers across the rectum wall. Touch the size, shape, texture of the ovary, the location, size, and elasticity of the follicular development, the thickness of the follicle wall, and whether the follicles are broken, and whether there are yellow bodies.
This method can be based on the degree of development of follicles more accurately determine the time of ovulation, and thus scientifically determine the appropriate breeding time, to reduce the number of breeding, reduce costs, improve the conception rate. This method requires skilled technology and experience to be able to inspect directly and be labor intensive. For those who do not have the technical staff to be trained, they can be checked to prevent mistakes.
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