Comprehensive Prevention and Control Techniques for Reproductive Disorders of Dairy Cows

Reproductive disorders in milk (female) cows means that cows are not in normal conditions of heat, pregnancy or pregnancy. There are many causes of reproductive disorders in dairy cows. Common cows have uterine diseases, abnormal ovarian function, and improper human operations. In addition, nutritional imbalance, seasonal (especially the hot season) factors can also cause infertility.

Uterine disease is the most common reproductive disorder. Uterine infection of cows is prone to inflammatory reactions, resulting in inflammatory exudate, severe purulent secretions, not only damage the internal environment of the uterus, resulting in sperm and eggs can not be pregnant, but also may cause cows due to long-term inflammatory irritation, Endocrine disorders lead to abnormal ovarian function and even systemic diseases. Therefore, effective prevention and treatment must be adopted:

First, reasonable midwifery. When the cows are giving birth, they must ask a professional for midwifery, strictly disinfect the delivery room, confinement equipment, and cow genitals. Special attention should be paid to the handling of difficult-to-produce cows and post-partum placental cows. After uterine cleansing and drug infusion treatment, to prevent secondary infection.

Second, pay attention to observe the performance of cows estrus, especially the observation of genital excretions, pay attention to whether the mucus is normal, if you find abnormalities must be promptly requested by the veterinarian.

Third, strict artificial insemination operating procedures. Strictly sterilize the artificial insemination equipment, clean and sterilize the external genitals before insemination, avoid rudeness in the insemination operation to prevent damage to the reproductive tract and secondary infection, and semen must be protected from contamination.

The common ovarian functional diseases are ovarian static, persistent corpus luteum and so on. When the cow's ovary was resting, it showed no estrus, no ovulation, and mild estrus. In other words, the estrus symptoms were not obvious. The rectal examination showed that the ovarian surface was smooth, and the texture was small and hard. For non-congenital bovine ovary, follicle stimulating hormone (FSH) can be injected intravenously at 100-200 units, or 20-40 ml of gestational horse serum can be injected intramuscularly or subcutaneously to promote follicular development. The main characteristic of the persistent corpus luteum is that although the bovine is not pregnant, there is a corpus luteum on the ovary and does not fade. The number and size of the corpus luteum vary, and most of them are mushroom-shaped and protrude from the surface of the ovary. The texture is hard. Treatment can be used intramuscular injection of follicle-stimulating hormone 100-200 units, such as ineffective injection every 2 to 3 days; or clomaprozol injection 4 mg, intramuscular injection or intrauterine infusion; or septal rectal massage ovary, daily 1 - 2 times, 3-5 minutes each time, for 3-5 consecutive days.

Balanced nutrition is indispensable for maintaining the normal reproductive function of dairy cows. In production, while avoiding long-term feeding of poor-quality feed, it is also necessary to avoid over-obesity in cattle. To provide cattle with green and juicy feed as much as possible, especially in the winter and spring, feeding green feed helps the cow's normal estrus. Keep the cowshed ventilated and cool as much as possible during summer heat. The barn should not be overcrowded and should be equipped with auxiliary ventilation fans. Conditional sprinkler installations should be installed. Feeding more green feed also helps cool the cow's heatstroke.

Poor hygiene conditions in barns and playgrounds can result in poor health status and increased opportunities for reproductive tract infections. Therefore, it is necessary to strengthen the hygienic management of the barn and sports grounds. At the same time, prevention and quarantine of bovine diseases should be done to prevent the occurrence of brucellosis and other infectious diseases in dairy cows.

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