How to synchronize cows

In order to make breeding more unified and convenient, people need to control the time of their oestrus, so that cows can conceive at the same time as far as possible, so that calves can be born at the same time for breeding, which is more conducive to the same breeding of breeders. So how to make cows in estrus at the same time? Next Shuai Shuai will tell you about it!

1. Progesterone vaginal embolization

The advantage of this method is that its effect is very long-lasting, it can work continuously, and it is very simple to use, but it is easy to fall off. First of all, we tie a piece of softer foam or sponge with thin thread, and then soak it with progesterone solution after disinfection. The size of the sponge depends on the size of the cow, so it is also a problem to send it inside. You can use long handle forceps to send the sponge into the vagina near the cervix, and then the end of the thread should be left outside, and then it can be pulled out with the thread at the end. It can be taken out after 9-12 days, and then the cow will be injected with progesterone at the same time. After two to four days, the cow will be in estrus.

2. Progesterone implantation

The special implant compound was implanted under the cow's ear skin and then taken out after 12 days. At the same time, the pregnant horse serum gonadotropin was injected intramuscularly. After 2-4 days, the cow will be in estrus.

3. Injection method

The drug is injected directly into dairy cows, and the substance injected is similar to prostaglandin F2a and similar substances, which can dissolve the corpus luteum, shorten the luteal phase of cows and enable them to come into estrus at the same time. Generally, cows are in estrus within 2-4 days after injection. This method is used for cows with corpus luteum above their ovaries, but has no effect on some cows without corpus luteum. Therefore, when choosing the method, it also depends on whether the cow has corpus luteum. Some cows will have no effect after injection of prostaglandin, which can be injected again 11-13 days later, which can increase the probability of synchronous estrus to 80%. And prostaglandin has the effect of dissolving corpus luteum, but it must be used cautiously, if the cow is pregnant, do not use prostaglandin, otherwise it will cause abortion. It must be determined that the cow is empty before use.

The above is the method of synchronous estrus for cows. Have you learned it? The method is very simple, the key point is which one is suitable for everyone, and the third one must be used carefully, otherwise there will be a miscarriage. I hope this article can help you.