Cow estrus cycle stops clinical symptoms and treatment
After the cow is ovulating (unfertilized), the corpus lute exceeds normal time without disappearing and is called the persistent corpus luteum. Because the persistent corpus luteum continues to secrete progesterone, inhibiting the development of follicles, resulting in long-term estrus of the female cows, resulting in infertility of the cow, which is very unfavorable for the growth of the cow, so today Xiaobian said that the cows estrus The cycle stops clinical symptoms and treatment measures.
First, clinical symptoms and diagnostic methods
The cow's estrus cycle stops, there will be a long period of estrus; the rectum is ovarian enlargement that can be touched on one side; if there is no change in the position, size, shape, etc. of the corpus luteum, the chronic corpus luteum can be diagnosed.
Second, prevention
1. Intramuscular injection of 2 ml of cloprostenol causes the corpus luteum to rapidly retract.
2, the application of cloprostenol, generally 2-3 days after the administration of estrus, at this time the breeding can be pregnant, while also preventing the cow's placenta, the cows 20-40 days in advance every year to conceive, reduce the occurrence of cow endometritis, etc. advantage.
Third, treatment
The treatment of persistent corpus luteum is mainly divided into Western medical method and Chinese medical method, as follows:
1. Western Medical Law
(1) Intramuscular injection of prostaglandin once a day, the injection volume is 5~10 mg, continuous injection for 2 days.
(2) Intramuscular injection of pregnant horse serum once a day for 2 consecutive days, the first day of injection is 30 ml, the next day the injection volume is 40 ml.
(3) A pregnant horse serum gonadotropin is injected subcutaneously every day in the neck, and the dose is used in units of 8 kilograms per kilogram of body weight for 2 consecutive days.
(4) After mixing 1500 to 3500 units of chorionic gonadotropin and 25 ml of physiological saline, intramuscular injection is performed.
(5) After mixing follicle stimulating hormone 100-200 units and 5-10 ml normal saline, intramuscular injection once every 2 days, 3 times for one course of treatment.
(6) Every 5 days, 20 ml of placental tissue fluid was injected subcutaneously, 4 times for a course of treatment.
(7) Intramuscular injection of l0~20 mg of diethylstilbestrol once a day for 3 consecutive injections.
(8) Extend your hand into the rectum of the cow, then grab the ovary through the wall of the intestine, remove the corpus luteum with the thumb at the base of the corpus luteum, and inject vitamin K to prevent bleeding.
(9) Intramuscular injection of 100 mg of progesterone once a day, and 50 mg of diethylstilbestrol dipropionate at the same time for the second and third injections.
2, Chinese medicine law
(1) Apply once with turpentine 20 ml + fish fat 20 ml + milk, and administer once a day for 5 days.
(2) Insert the rectum into the hand, and then find the ligament of the ovary. At the junction of the ovary and the corpus luteum, use the thumb to crush the corpus luteum.
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