Cow estrus is a rhythmic biological phenomenon. Cattle are year-round multi-cycle estrus animals, that is, they can estrus all year round, there is no seasonality. When the weather is warm and the forage is good, the estrus is obvious, the breeding is more susceptible to pregnancy, and the follicle development of cattle is also better during this period when observed by B-ultrasound. In order to accurately grasp the estrus time of cows and improve the detection rate and fertilization rate of estrus cows in the herd, artificial insemination staff and breeders should master and be familiar with the basic situation of the cattle they are responsible for, and carefully check at least 2 times a day, and it is best to use bovine B-ultrasound to observe whether there are estrus cows.

Bovine ultrasound BXL-V30

Estrus cows detected by B-ultrasound, regardless of whether they were mated this time, should be registered so that these cows can be inspected next time. Breeders, herders or cattle farmers should also pay attention to the dynamics of their cattle, observe whether they have estrus, and inseminate the estrus cows in time. The key is to grasp the estrus of the cow accurately for the good or bad effect of conception after B-ultrasound inspection. Generally, the external performance of normal estrus cows is more obvious, so external observation supplemented by vaginal examination can be judged. However, the cow's estrus duration is short, and it is easy to leak out without attention to observation, so it is best to use bovine B-ultrasound to carry out. In production practice, it is possible to mobilize the watchman, the breeder and the milker to observe together. Establish the estrus forecasting system for cows, and forecast the next estrus date (calculated by estrus cycle) according to the previous estrus date. Some cows often have quiet or false estrus, some cows are malfed, reproductive organ function decline, follicle development is slow, and ovulation time is delayed or advanced. It is necessary to determine the ovulation time of these cows by rectal examination or bovine B-ultrasonography.

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