The occurrence of recessive abortion within 2 months of the cow's pregnancy often occurs, which is a loss to the cattle industry and should be highly valued by the majority of cattle farmers. 1 to 2 months after mating, the cows were diagnosed as having been diagnosed with estrus, and then the estrus performance was revealed. The disappearance of the original pregnancy traits was considered as recessive abortion. After the death of early blastocysts and embryos, their tissues are liquefied and absorbed by the mother or excreted in the urine during the estrus. It is not easy to be discovered. The cattle farmers mistakenly believe that they are due to the technology of the breeder, the quality of the semen used, and so on. There are a lot of troubles. To prevent dairy cows from producing recessive abortion during production, the following work should be done.
Strengthen the nutrition cows to provide nutrient-rich and comprehensive high-quality feeds rich in Vitamin A, vitamin B2, vitamin B12, minerals, trace elements, etc. to prevent fetal deaths due to nutritional deficiencies or nutritional imbalances, and maintain normal pregnancy to ensure early The normal development of the embryo requires. At the same time, we must stop feeding single cow feed or frozen, mildew feed, and potato, cottonseed cake and other toxin-containing feeds.
Careful Pregnancy Care must be taken when performing pregnancies on mated cows. In early pregnancy, the embryo is in a free state, or is not tightly combined with the maternal uterine mucosa. If it is not careful and violent during pregnancy detection, the embryo may die and the attachment may not be successful. Especially when rectal examination should be gentle, so as not to damage the early embryos, resulting in an artificial abortion.
Perfect management creates a good living environment for pregnant cows. After mating, the cows should be housed in a conditional manner, so as to avoid adverse impacts on the embryos caused by mutual collision and crowding during breeding; avoid fierce activities, do not cross the ditch, walk on the skating sewer, whip and kick. Frighten to eat and drink, etc.; keepers must not be frightened and beaten cows; give enough clean drinking water, do not drink frozen cold water during the cold season; pay attention to the cleanliness and hygiene of the cattle body and the environment. Do not overeat or overwork.
Strengthen disease prevention and control Effective prevention and control of tuberculosis, salmonellosis, and brucellosis that can cause miscarriage. For livestock groups that are not affected, livestock are not introduced from the affected area; if they must be introduced, they should be imported from disease-free areas, and quarantined and reared under isolation conditions to ensure that the disease-free herds can be mixed. Regular quarantine is conducted every year and diseased cattle are found to be eliminated in time. Cows are vaccinated against attenuated Brucella vaccine 1 to 2 months before mating. Keepers, milkers, and veterinarians should regularly check the body and people with tuberculosis should not contact the herd. Strengthen the cleaning and disinfection of herds and the environment, and often pay attention to the health of dairy cows and carefully brush, especially to maintain the abdominal hygiene of pregnant cows and prevent the occurrence of vaginitis and metritis.
When a cow is to be replenished two months after mating, inspections should be conducted promptly to find that the abortion is supplemented as soon as possible to avoid emptying for too long, resulting in a decrease in the breeding rate of the cows and influencing the economic benefits of breeding.
Application of anti-flow drugs Cows In the early stages of pregnancy, progesterone should be injected for fetal protection, once a day, 50 to 100 mg each time, every other day, once every 3 to 4 times.
Pay attention to daily medications Taking large doses of certain drugs after pregnancy may cause abortions in cows, including laxatives such as sodium sulfate, magnesium sulfate, etc.; antipyretic analgesics such as quinine sulfate, etc.; and cholinergic drugs such as carbamoyl Acylcholine, pilocarpine nitrate, trichlorfon, etc.; stimulants, such as strychnine hydrochloride; misuse of uterine contractions, such as oxytocin; aphrodisiac drugs, such as diethylstilbestrol, prostaglandins, etc.; Glucocorticoids; such as cortisone acetate, hydrocortisone, dexamethasone, etc.; and other drugs that are contraindicated in pregnancy.
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