The immunity and resistance of cows during pregnancy are relatively poor, so you must pay attention to the mental state of the cows when breeding, and learn some breeding techniques and methods to prevent diseases, so that breeding cows during pregnancy will not cause illness. Produce economic losses.
　　 1. Strengthen feeding management
　　The diet should be balanced and the feed should be diversified. The diet should be adjusted in time according to the changes in physiological characteristics. In the reasonable supply of energy and protein feed, attention should be paid to the supply of mineral feed calcium, phosphorus, manganese, zinc, iron and vitamins A, D, E; no moldy or deteriorating feed should be fed; When pregnant cows are being treated, medication should be used with caution, and laxatives and aphrodisiac drugs should not be used indiscriminately.
　　2. Clinical miscarriage has occurred, and the cause should be found out
　　 Each aborted cow should be fed separately, and the aborted fetus and fetal membranes should be carefully inspected to observe whether the fetus has malformations, and whether the placenta has edema and necrosis. In order to confirm the disease, the cow's blood, uterine secretions, the four stomachs of the fetus and its contents, liver, and spleen can be collected for microbiological examination; check whether the cow has systemic diseases and understand the feeding and management situation. Aborted fetuses, afterbirths, and litter should be buried deeply or burned.
　　 3. Vaccine injection
　　 In order to prevent miscarriage caused by infectious diseases, it should be done: inoculate 5-6 month old calves with pig 2 or sheep 5 vaccine. Adult cows are tested for brucellosis test tube agglutination reaction once or twice a year, and positive cows should be isolated; as the herd expands, cows are introduced frequently, and some new infectious diseases in dairy cows such as infectious bovine rhinotracheitis Wagyu viral diarrhea is also gradually spreading. For this reason, vaccinations should be considered.
Interruption of pregnancy is a common pregnancy disease in dairy farms. The harm caused by it is not only the death of the fetus and the decrease in calving rate, but more importantly, it destroys the normal calving time, prolongs the number of empty days and the calving interval, and directly affects The amount of lactation and the final amount of milk produced by this parity. Therefore, preventing dairy cows from miscarriage is an important task in dairy cow production.