Q: My sow was estrus today (in a circle). When will it be suitable for breeding?
A: That's when we talk about sows' estrus and ovulation patterns. After estrus, sows generally ovulate in 25 to 36 hours (average 31 hours). The duration of ovulation is approximately 10 to 15 hours. After fertilization, fertilization is performed 8 to 12 hours after ovulation. The fertilization site is located on the upper 1/3 of the fallopian tube; after mating It takes 2 to 3 hours for the sperm to reach here. According to this physiology, sows are most suitable for breeding 20-30 hours (mean 26 hours) after estrus.
Q: Is it more appropriate to use sows several times after estrus?
Answer: After the first mating, the interval is 18 to 24 hours, and most of them get better results. If the number of boars allows, two to five minutes apart, two boars and one sow are mated. The advantages are: can supplement the sow's reflective excitement, prompt the egg to mature, shorten the ovulation period, increase the number of ovulation, the egg has more chances to choose the fertility of the sperm with strong vitality, this will not only produce more lice, but also the piglets are neat and have a strong life force. .
Q: What else should we pay attention to?
A: Yes, the following details should also be mastered:
1. Sexually mature sows have an average estrus cycle of approximately 21 days. The first estrus period is not matched (backwards), and it is necessary to pay attention to grasping the next situation. In the next situation, it is better to replace the other breeding boar.
2. During the estrus of the sow, most of the vulva swollen, loss of appetite, performance anxiety, often screaming, arching, jumping, frequent urination and so on. If a sow is willing to approach the boar and allows her to cross, press her waist with her hands, and often stand still, he should be able to breed in time.
3. Although we mentioned that sows began to breed on average about 26 hours after estrus, estrus is difficult to define at the beginning of its estrus. Most of them are not noticed by people. They are often found at the time of prosperity, so mating is generally recommended. Should not be late (sperm in the sow reproductive tract, generally can maintain 10 to 12 hours of fertilization capacity). In actual production, sows are allowed to cross-climb (stabilize the bar) for breeding. One love period is allocated once a day and two days are sufficient. If a boar is enough, on the third day, the sow can still crawl, and it can be matched once again. In principle, it is better to use the affection to ensure that there is enough sperm and egg to meet, which will help improve the conception rate.
4. For sows whose estrus symptoms are not obvious, it is best to try the boars (that is, letting males and females come into contact with each other), once each morning and evening, to prevent leakage. This will not only identify the estrus of the sow, so that timely mating, but also play a tease, stimulating the sorrow libido and promote follicle maturation.
5. The masses have the saying that “there is an early match, a small match with the late, and a middle ageâ€. The summary of this experience is justified and for reference.
6. Sow fat and thin should be moderate, too fat too much affect their reproductive ability.
7. Sows do not circle too hard, give appropriate exercise to promote health and promote estrus.
8. To prevent inbreeding, the selected boars must not have close relatives with the maternal sows, otherwise inbreeding, prone to malformation, stillbirth, even if the living piglets, vitality is not strong, poor adaptability, resistance Weak, prone to illness.
Q: My family produced a litter of litters six months ago. I chose to keep a small gilt in the house. It seems that I have also had estrus. Is breeding now available?
A: What is your family's gilt?
Q: It is the offspring of the Yorkshire crossbreeding with the local pigs.
Answer: The age of hybrid female sows is 8 to 10 months after birth and the minimum weight is 70 kg or more. The gilts in your family are just 6 months old from birth until now. Pigs are livestock that are sexually mature and have late maturation. The average hybrid pig has estrus performance in the first five to six months after birth, and has the desire for breeding and the possibility of conception. However, due to the fact that the gilt has not yet reached maturity, the reproductive system development has not yet been perfected. It is in a period of vigorous growth and cannot be allowed to breed. If the mating is too early, there will be less calving, and the piglet will have a small body weight, poor health and low survival rate, which will also affect the growth and development of the sow. However, it is not too late to extend the bred period at a later party to increase the cost of raising the broiler. To say that it is too late to produce, is also economically a loss.
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