The estrus cycle is about 21 days. If the breeding fails, it will heat again in about twenty-one days; but in production, it is often found that the sow is not estrus in twenty-one days or twenty-one days. Multiple times, but postponed by several days or more, what is the reason mud? This is because the sows are not matched when they are mated, but the fertilized eggs will die later, so that the time for the sow to return to heat will be pushed backwards, and the time will not be equal. If this phenomenon is found, it is necessary to consider whether the sow will have unfavorable behaviors after mating, such as compulsory exercise, excessive feeding after the matching, etc.; but this can not be ruled out as related to the boar, because if the quality of sperm or egg Poorly, it may be barely fertilized at the time, but the fertilized egg is very weak and it will die early. Do not underestimate this issue, because only when the real cause is found can proper measures be taken; there are also many ways to find this problem, such as sow cards, computers, breeding records, etc.; the key is the attention of relevant personnel, and they often pay attention to and check. Will definitely find the problem. Knit Cotton And Dotted Gloves,Pvc Dot Knit Gloves,Gloves Cotton Knitted,Dot Knit Gloves Jiangsu Hespax Security Co., Ltd , https://www.hespax.com