The etiology and diagnosis of cow ovarian disease suggest that in the clinic, cow ovarian disease is one of the most common reproductive diseases, which has a serious impact on lactation and calving of dairy cows and has caused huge economic losses to the dairy farming industry. Because the etiology of ovarian diseases is complex, it is difficult to diagnose and treat them. Ovarian diseases are divided into many kinds, mainly summarized as follicular dysplasia, follicular atrophy, ovarian motility, persistent corpus luteum, follicular cyst, delayed ovulation, follicular interspecific development, anovulation, and ovarian inflammation. The following is about the causes, diagnosis, and treatment of the above cow diseases.
1. Ovarian dysplasia
Etiology: This disease is congenital reproductive organ disease, also known as infantile disease. The main causes of this disease are breeding bull cows for inbreeding dairy cattle.
Diagnosis: The growth and development of this kind of cattle are generally not affected, but when the cows of the same age are sexually mature and show oestrus, they do not show oestrus. A direct examination can find that the reproductive organs such as ovary and uterus are smaller than normal tissues, and there are no luteal follicles on the ovary, which proves that they have never had normal follicular development, ovulation and corpus luteum.
2. Ovarian atrophy
Etiology: The main reason is the postpartum malnutrition of cattle with long-term reproductive organ disease. It also shows that the feed nutrition facts level of high-yielding and multiparous cattle can not meet reproductive needs, which leads to the long-term non-cyclical activity of ovaries and subsequent ovarian atrophy.
3. Ovarian motility
Diagnosis: The main manifestations were high-yielding cattle, long-term estrus, normal ovarian texture, but no follicles and corpus luteum on the ovarian surface.
4. Persistent corpus luteum
Etiology: Uterine diseases (pyometra, hydrops, hysteresis) can cause the occurrence of this disease, feeding management can also cause the occurrence of persistent corpus luteum.
Diagnosis: Menstrual and High-yielding female cows are susceptible to this disease. After an estrous cycle, cattle no longer show normal regular sexual activity. The larger corpus luteum on one side of the ovary was found during direct examination. The hard texture of the corpus luteum prominently protrudes the ovarian surface.
5. Follicular cyst
Etiology: Lack of vitamins in feed, imbalance of concentrate ratio and inadequate exercise are the main causes. Also, uterine diseases can lead to the occurrence of this disease.
Diagnosis: During cattle farming, cattle generally show no oestrus (80%), but some cattle will appear Nymphomania symptoms, continue to oestrus and stop, direct examination of the uterus is basically normal vaginal congestion and a small amount of thin mucus, ovaries larger than normal ovaries, sometimes one side can occur at the same time on both sides, ovaries have a larger follicle distribution. The thickness of the ovarian wall is not easy to pinch, and the ovarian volume changes little, but the number and size of follicles are inconsistent, and they do not ovulate for a long time. Ovarian size and follicular texture are the main criteria for the diagnosis of this disease. When a single follicle is slightly older, it can be correctly diagnosed according to the ovulation and texture of the follicle.
6. Alternate follicular development
Etiology: During follicular development, due to the imbalance of luteinizing hormone and follicle-stimulating hormone, follicular development stopped atrophy and new follicular development continued.
Cattle oestrus cycle is shorter, long-term estrus, after insemination can not be a normal pregnancy, direct examination follicles are too small, after some time follicles atrophy, the direct examination will find new follicles.
7. Luteal cyst
Etiology: Improper treatment of follicular cysts can lead to the occurrence of this disease.
Diagnosis: Cattle have no estrus for a long time, follicular cyst history in the history, the position of the original follicle from the luteal body of different sizes, prominent on the ovarian surface, no follicular development, but the luteal body long-term existence.
8. Anovulation
Etiology: In the late stage of follicular development, when other hormones are normal, only luteinizing the body can not reach the peak value, which causes ovulation disorder and then forms atresia follicle anovulation.
9. Ovaritis
Etiology: Because salpingitis is related to human touch and causes injury.
Diagnosis: Mild ovarian inflammation is not easy to diagnose. In severe cases, the ovaries can adhere to the fallopian tube and pelvic cavity without dissociation and have normal estrus but are not pregnant for a long time.