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Causes of infertility in cows Treatment methods Lodge licking bricks
Release time:
2019-03-11
Nutritional factors. Cattle obtain nutrition through feed intake, which is used to meet the needs of body growth, maintenance and reproduction. Feeding a single feed, or poor quality feed, etc., will lead to lack of nutrition in the body, showing too thin body condition, thus significantly delaying the initial estrus period of young cows, adult cows will have lack of estrus, abnormal estrus cycle, which will lead to reproductive disorders and complete loss of fecundity in severe cases. Reasonable with feed, increase the licking brick free licking, supplement trace elements, Lodge licking brick to promote pregnancy effect is remarkable.
Cow infertility refers to primiparous cows reaching the appropriate age mating age after3There was still no estrus and mating for months, and the postpartum cows were passing through.3Mating or fertilization after the first estrous cycle still shows a temporary or permanent inability to conceive. Infertility can lead to significantly longer intervals between births,Reduced number of calves,Serious damage to the economic benefits of cattle farms and cattle farmers.,It should be treated. The following specific to understand: the cause of infertility in cowsSeveral treatments for common infertility in cows.
1Causes of occurrence
Cow's own factors. Congenital infertility, that is, the poor development of the uterus due to congenital factors, such as the uterine horns are too long and too thin, sometimes the entire uterine horns will be straight and cylindrical, and the cervix cannot be opened3At the age of using drug stimulation is still unable to open; Ovary is too small, only the size of soybean grains. Physical infertility, that is, cows after two births, easy to lead to body condition is too fat, causing ovarian cysts, making it often estrus; body condition is too thin, most of them can not ovulate, and estrus signs are not obvious.
Nutritional factors. Cattle obtain nutrition through feed intake, which is used to meet the needs of body growth, maintenance and reproduction. Feeding a single feed, or poor quality feed, etc., will lead to lack of nutrition in the body, showing too thin body condition, thus significantly delaying the initial estrus period of young cows, adult cows will have lack of estrus, abnormal estrus cycle, which will lead to reproductive disorders and complete loss of fecundity in severe cases. Reasonable feed mix, increaseLick brickFree lick, supplement with trace elements,Rocky Lick BrickThe effect of promoting pregnancy is remarkable.
environmental factors. In the natural environment, temperature, humidity and light will change with the seasonal changes, which can stimulate the reproductive endocrine system, resulting in a series of reproductive physiological reactions. Generally speaking, the hot summer climate will lead to a decrease in the rate of mating. In the northern regions, the winter climate is cold and most cows are in anemic period at this time. If the barn is located in the air, water, noise serious pollution area, can also affect the normal estrus of cows.
Disease factors. When cows are infected with certain diseases, such as ovarian cysts, persistent corpus luteum, endometritis, etc., can cause secondary infertility. In addition, if the breeders do not regularly take disease prevention and effective response measures for cows, they may indirectly cause infertility.
2Clinical symptoms
Infertility caused by lack of nutrition. After the cow is pregnant, the embryo is underdeveloped, and the abdominal circumference is not significantly increased, the fat condition is poor, the hair is sometimes bent, with poor luster, after3Months later, wigs of climbing across other cattle sometimes appear, but they refuse to mate and a small amount of translucent gelatinous mucus flows out of the vulva. Through rectal examination, it was found that the cervix was enlarged, and there were mature follicles on one side, which were above normal estrus; some embryos of pregnant cows were difficult to implant, had weak anti-stress ability, and were easy to die in the early stage.
Infertility due to endometritis. Sick cattle will raise their tail arch back when in estrus, and often do urination and blame posture; There is a large amount of translucent mucus flowing out of the vagina, with poor fiber strands, often mixed with flocculent, emitting fishy smell, and adhesion at the tail root and ischium end, gradually forming brown-yellow dry scab, and some landing mucus will have obvious bubbles and cavities. Through direct examination, it was found that the cervical mouth was significantly thickened and the uterus became hard, elasticity disappeared; most of the uterine effusion, the organ increased significantly; poor maturity of follicular development, no obvious sense of movement.
Infertility caused by persistent corpus luteum. The reserve cow shows a delayed estrus and will generally be in1.5～2.5oestrus occurs after the age of 18 or more; the maternal cow passes after childbirth.4～8Months or longer, some will appear hidden estrus; Estrus can only last for a short time, sexual desire is low, and there will be no climbing phenomenon, while his cow will appear when climbing.“Feeling of fear”As well as the phenomenon of flashing waist; Vagina has very little translucent mucus outflow, no fiber and wisps, and it is difficult to find estrus. After mating and conception, some cows develop wigs again after months, which are still present on one side through direct examination.“Dry”Follicles or cyst follicles.
Infertility due to ovarian cysts. The disease usually causes cows to be around after giving birth.4～6Estrus only appeared in the next month, and the sexual desire was strong during the estrus period, resulting in madness. After climbing over other cattle, the reaction was weak, the feeding was reduced at the initial stage, and the hair lost its luster. There is a large amount of translucent mucus flowing out of the vagina, slightly yellowish, and the fiber is poor. Mating after10～16The day will come back. If improved feeding management, some cattle will gradually heal themselves over several months.
3Treatment measures
Symptomatic treatment. Endometritis, first wash the uterus, often choose to use0.5%Furacilin,1%Baking soda solution,1%～10%salt water,0.02%～0.05%Potassium permanganate, etc., the temperature of the flushing liquid is suitably controlled40～45℃, the dosage is controlled500～1000mLEvery day or at intervals.1Days carried out1Rinse until the liquid is completely transparent. If the sick cow is in estrus and the cervix is not open, the catheter can be inserted directly through the vagina for flushing. If the cervix is closed tightly, estrogen can be used first, and the cervix can be flushed after it is relaxed and opened. If there is uterine hydrops or uterine pyometra, the fluid accumulated in the uterus should be discharged before flushing. After flushing, to combine the actual situation to inject into the uterus by antibiotics, sulfanilamide, furacilin or other disinfectants prepared into the water, suspension, water-oil emulsion or oil, the amount is usually controlled in.20～40mL. Persistent corpus luteum, intramuscularly injectable in sick cattle5～10mgProstaglandins or0.5～1mgchloroprostenol, used1times, usually in1Within weeks, if there is no effect, it can be7～10days after the injection1Times. follicular cyst, intravenously available in sick cattle1000millionIUchorionic gonadotropin, combined with intramuscular injection10mgProgesterone, continuous use14Days, according to the appearance of changes, if the symptoms have been reduced or effective, to continue medication until full recovery.
Strengthen feeding management. Ensure a balanced diet to stimulate appetite and avoid negative energy balance. The cattle barn is kept well ventilated and the humidity is low. In summer, strengthen cooling and heatstroke prevention, winter to strengthen the cold and warm, and supply enough light. Develop a reasonable disinfection system, the environment, enclosure should be regularly disinfected.
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