Sow pseudopregnancy means that the sow does not show obvious sympathetic symptoms after estrus and mating. It shows a pregnant state. Over time, sows develop a series of symptoms that resemble normal pregnancy. At the end of pregnancy, although symptoms of childbirth occur at the time of childbirth, no comprehensive syndrome of piglets is produced. The long-term consumption of sows after pseudo-pregnancy of sows also makes the breeding plan fail, causing losses to farmers. I. Clinical Symptoms The estrus performance of the diseased pigs was approximately normal. After mating, the sows showed similar performance to normal pregnancy over time. The action was slow, the sensation gradually recovered, and the abdomen increased slightly, but it was not obvious. Before farrowing, sick pigs have grass nests, disturbed movements, increased frequency of excretion, swelling of the vulva, but no mucus outflow. Although the breasts are obviously swollen, milk can be extruded but milk is less and thin. During sow farrowing, there are obvious symptoms of childbirth, there is a contraction table II, cause analysis (1) After sow estrus, although artificial insemination or natural mating, but not pregnant. However, the corpus luteum formed on the ovaries not only has not been degraded, but on the contrary it continues to secrete progesterone, resulting in a series of similar pregnancy. (2) The sows are often fed with tapeworms for a long time, their body condition is thin, and they are severely stung. The nutrient reserve of the body is consumed in large quantities, and even the breastfeeding defects occur, which leads to disorder of the hormone secretion and regulation function of the body. (3) Unbalanced feed nutrition. Feeding a single feed for a long period of time, lack of vitamins, trace elements, especially VE is seriously lacking. (4) Diseases of the reproductive tract cause ovarian dysfunction. (5) misuse, abuse of hormone drugs aphrodisiac. (6) Internal parasites invade the reproductive system. Third, comprehensive prevention and treatment (1) do a good job of feeding in stages to prevent the sows from being overly fat or overweight. To supply the green feed as much as possible, pay attention to the supplementation of VE, add sodium selenite VE powder, or soak the barley to germinate and supplement the sows. (2) If the sow is abnormally estrus, do not rush to breed. Take targeted treatment. After normal estrus in the natural state, perform breeding again. (3) Good short-term feeding of weaned sows. For weaned sows, weaning should be strengthened after weaning, and appropriate amount of protein feed should be added. Every time after weaning, we must carry out an insecticide and epidemic prevention. For sows with poor lyrical condition, breeding must be performed after the disease has recovered effectively. (4) Carefully observe the behavior of the sow after mating, and find that the pseudo-gestation sows take early measures to terminate the pseudo-pregnancy. (5) Preventing reproductive tract diseases from affecting ovarian function, intramuscular injection of penicillin after sow delivery, twice daily, for 3 consecutive days. (6) Targeted selection of hormone drugs for aphrodisiac, preferably in natural estrus. (7) with the application of drug treatment: intramuscular injection of prostaglandin 1 ~ 2 mg, or intramuscular injection of methyl testosterone 1 ~ 2 mg.
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