Core Tip: According to the recommendations of pig e-net users, pigs should pay attention to these issues during the artificial insemination insemination process. See below for details.
The pig e network news: Insemination in the artificial insemination process is an important process, it is related to the sow's conception rate and farrowing nest number, but if insemination is improper can also lead to the occurrence of sow endometritis. This article deals with issues that pigs should pay attention to in the insemination process. for reference only.
1, the insemination process takes less than 5 minutes, insemination is too fast, semen may have reversed, because the sow’s vagina can sink due to the weight of semen, so that semen does not flow out of the body, this part of the semen is not Will enter the uterus. However, it is best not to exceed 15 minutes. If it exceeds 15 minutes, there is a problem with this insemination process.
2. The sows should avoid approaching the boars or scent of the boars at least 1 hour before inseminating, so that the sows do not enter the refractory period after being highly excited and have an adverse effect on insemination and abortion.
3, the rate of insemination should be appropriate, too fast insemination can return semen after a few minutes or ten minutes after insemination.
4, do not force the sow buttocks to reduce semen back after insemination. Any stress factor before or after insemination will have an adverse effect on fertilization. After soaking the sow buttocks sow the buttocks muscles of the sow, and temporarily avoid semen backflow, but after being frightened, the body will release epinephrine and counteract the effects of reproductive hormones such as oxytocin, which will weaken the uterine contraction wave, affecting Semen runs deep into the uterus and has an adverse effect on egg fertilization.
5. If the semen flow is large, insemination should be repeated. A large amount of semen backflow does not ensure the total amount of semen entering the uterus. Therefore, the insemination process should be reviewed so that the sow can rest after two hours of rest.
6, pay attention to the first insemination, to avoid excessive insemination. If the insemination time can be accurately grasped, the sow only needs one insemination to ensure a good conception rate and litter size. The first insemination is crucial for the conception, so the correct infusion time should be determined based on experience and various information on the sow's estrus, so as not to miss the best insemination time. The second insemination is a method of increasing the coverage factor of the conception, 12 hours for the initial sow at intervals and 12 to 18 hours for the sows. But don’t worry about missing the best time for the first insemination and in advance of insemination. Practice has shown that insemination is not achieved until the sow has not achieved a good standing response. It is very harmful to the sow’s health and conception risk. . On the other hand, we must avoid too late late insemination, because late insemination, sows because of estrogen levels will fall rapidly after the end of estrus, and make the resistance of the uterus decreased, when the insemination of microorganisms in the semen May cause uterine infection. More than three inseminations seem to have no practical significance for the increase in fertility rate because sperm can maintain fertilization in the sow's reproductive tract for more than 24 hours.
7, after the end of insemination, should avoid the sow lying down within 10 minutes, it is best to avoid sow drinking cold water. Under the sow, the sow will increase her abdominal pressure and cause semen backflow. If the sow should lie down, she should drive it away, but it should not be treated harshly; drinking cold water may stimulate gastrointestinal and uterine contractions. Semen backflow.
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