Reasons and prevention of sows after weaning

The lack of sow after weaning means that the sows do not have natural estrus within 20 days after the weaning of the piglet, and no signs of estrus have been present or the estrus has ceased in the sow for more than 30 days. This is a reproductive problem that is currently prevalent in lean-type breeds and their binary crosses, and is even more prominent in large-scale pig farms.

I. Common Causes for Delaying Oestrus or Non-estrus After Weaning

1. Precocious sows are mated prematurely. Not only will it lead to young piglets being born at a young age, piglets will have smaller initial weight, lower weaning weight and lower survival rate, but it will also affect the weight gain of the sow itself. When it is reached, its weight will be significantly lower than that of the same breed of sow. In sows with a small body weight, the estrus after weaning is significantly delayed, and some are no longer estrus.

2. Severe dropout during lactation. Under normal circumstances, the sow goes through a lactation period, and the body weight is reduced to varying degrees. The general weight loss ratio is about 25%. This does not affect the normal estrus breeding after sow weaning, but if the diet is nutritious, If the amount of lactation is too large and there are too many babies, the sows will be abnormally thin when they are weaned, and the weight loss will be larger, so the estrus breeding after sow weaning should be significantly delayed.

3. Temperature and light effects. When the ambient temperature exceeds 30°C in the summer, it will interfere with the estrus of the sow and reduce the intake of food and ovulation. In the summer when the temperature is above 32°C, many sows will stop estrus. The lack of light in the pigsty or the daily light for more than 12 hours can also inhibit the estrus activity.

4. Sow fat. Some sows during lactation have low lactation levels and fewer piglets. There are also pig farms that use high-protein and high-energy diets. They are fed for a long period of time and are not fed until the time of weaning. The fat in the body is deposited, causing the body to become overweight. Causes the follicular development of the sow to stop and cannot normal estrus.

5. Feed raw materials moldy. Maize mycotoxins, especially zearalenone, have the greatest influence on normal estrus in sows. After sows consume feed containing this toxin, their normal endocrine function is disrupted, leading to abnormal estrus or suppression of ovulation.

6. Ovarian dysplasia. Long-term suffering from chronic respiratory disease, chronic digestive system diseases or parasitic gilts, the ovarian hypoplasia, follicular dysplasia so that hormone secretion, affecting the heat.

7. Sows have reproductive disorders. Disease factors such as swine fever, blue ear disease, pseudorabies, parvovirus, Japanese encephalitis virus, and Eperythrozoon will cause soreness and other reproductive disorders in sows. In addition, sows with mastitis, endometritis, and adipocytosis had higher rates of estrus after weaning.

8. Insufficient stimulation of the boar. The sows are too far away from the boar, and the weaned sows are not given the proper sexual stimulation. Lack of enticement leads to no estrus.

Second, sows post-weaning delay or estrus prevention methods

Other Steroid Powder

Other Steroid Powder
We are a professional company aimed at pharmacy raw material, like anti-depression drug raw material , anti acne drug raw material, antibiotic raw material, Nootropics Drug raw material, Local Anaesthetic Agents ,Bodybuilding Peptide , Sarms ,API Powder etc.
Our Company Advantages:
1, High quality with competitive price:
1) Standard: U.S Standard
2) All Purity≥99.8%
3) We are manufacturer and can provide high quality products with factory price.
2, Fast and safe delivery
1) Parcel can be sent out within 8 hours after payment. Tracking number available
2) Secure and discreet shipment. Various transportation methods for your choice.
3) Customs pass rate ≥99.8%
4)We provide re-ship policy.
5) We have warehouse in Australia, Canada and England, we have large amounts of stock in the warehouse, can ship to you directly from our foreign warehouse!
3, We have clients throughout the world.
1) Professional service and rich experience make customers feel at ease, adequate stock and fast delivery meet their desire.
2) Meeting customers's requirement is our responsibility.

3) High quality, competitive price, fast delivery, first-class service gain the trust and praise from the customers.

Other Steroid Powder,Steroid Powder,Steroid Raw Powder,Steroid Raws

Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.apipepdite.com