Skillful knowledge of abnormal heat in cows

Under normal circumstances, cows have certain rules of estrus. Since the estrus of cows is often affected by internal and external factors (such as nutrition, labor, climate, etc.), sometimes cow estrus can exceed the normal law, which is called abnormal estrus. The following describes the performance of two types of abnormal estrus.

Recessive estrous cows have poor libido or lack of libido during estrus. Although they are estrus they are not easily detected. This phenomenon is more common in postpartum cows and emaciated cows. Mainly due to lack of estrogen secretion, malnutrition and other reasons.

There are two cases of pseudo-estrus in pseudo-estrus cows. One is that cows have been pregnant for about 5 months and suddenly have sexual desires. If they are willing to accept a climb, etc. However, when performing vaginal examination, the cervix shows contraction or semi-shrinkage outside the mouth, no mucus, and can touch the fetus during rectal examination; the other is that although the cow has various external manifestations of estrus, but repeatedly with infertility, rectal examination At the time, it can be found that there is no development of follicles in the ovary, and finally can not ovulate, these phenomena occur most often in cows suffering from endometritis.

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