Animal B-ultrasound machine analyzes the causes of animal reproductive disorders

1. Environmental factors

Animal reproduction is very important in continuation, but there are many factors that can cause animals to be unable to reproduce. Boxianglai animal B-ultrasound machine analyzes the causes of animal reproductive disorders:

Seasonal factors are one of the important causes of animal reproductive disorders. The important factors of seasonal changes are light and temperature. During the high temperature period in summer, female animals have no obvious estrus symptoms and low conception rates. At the same time, high temperatures can also affect embryonic death and embryonic development. The follicular development process of horses is greatly affected by temperature. The follicle development rate is slow in early spring or hot weather, while the development rate becomes faster in May and June, and ovulation develops normally. Cold, high humidity, poor ventilation, high temperature, etc. often put animals in a state of stress, resulting in a decrease in the body's resistance and changes in reproductive function, such as a decrease in semen volume, an increase in the number of abnormal sperm, a decrease in vitality, and embryonic death. The normal reproductive function of animals is disturbed by external factors, which will lead to functional reproductive disorders. Male animals show testicular dysplasia, cryptorchidism, lack of libido, and difficulty in mating; female animals show ovarian dysfunction, ovarian cysts, persistent corpus luteum, abnormal fertilization, and abnormal eggs.

2 Genetic factors

Genetic factors can cause abnormalities in the reproductive organs of male and female animals, leading to reproductive disorders, such as uterine dysplasia and reproductive organ malformations in female animals, and genital dysplasia, testicular deficiency, and cryptorchidism in male animals. Congenital reproductive disorders are due to congenital abnormalities of reproductive organs due to genetic factors or during embryonic development, or biological defects in the gametes and fertilized eggs produced, resulting in loss of normal fertility.

3 Endocrine factors

Animal reproductive endocrine is regulated by the hypothalamus-pituitary-gonad axis. When endocrine is abnormal, male animals are prone to azoospermia, oligospermia, and lack of libido. In female animals, it can cause lack of estrus, anovulation, follicular cysts, and persistent estrus.

4 Age factors

As male animals age, they mainly experience testicular degeneration, loss of libido, and spinal and limb diseases, making mating difficult. Testicular degeneration in aged breeding animals is manifested as tubular degeneration, calcium precipitation, and testicular interstitial fibrosis, which can easily lead to loss of libido, reduced semen volume and sperm count, and poor sperm motility. As female animals age, the number of abnormal estrus, unclear estrus, delayed ovulation, and repeated infertility increases, such as the increased incidence of dystocia, retained placenta, and uterine diseases in dairy cows.

5 Management factors

Good feeding management is an important measure to improve fertility and reduce reproductive disorders. For breeding bulls used for artificial insemination, unsuitable pseudovaginas, stage animals, semen collection methods, semen collection sites, whipping, and frightening can cause adverse reactions and reduce semen quality. Insufficient exercise, excessive semen collection, whipping, or frightening of bulls can cause stress, resulting in loss of libido, reduced semen quality, and shortened service life. When female animals are kept in cold, damp, insufficient light, poor ventilation, and the body is often in a state of tension, their resistance is reduced, their reproductive function changes, and abnormal sexual cycles and lack of estrus are caused. In addition, careless artificial insemination, unreasonable delivery, and poor postpartum care can all cause reproductive organ diseases and lead to reproductive disorders.

6 Nutritional factors

Nutrition deficiency, insufficient protein, and poor feed quality are important causes of infertility in female animals, which manifest as no estrus, cessation of follicle development, and follicular cysts. Sudden changes in feed ingredients can cause no estrus, abnormal sexual cycles, etc. Low nutritional levels can cause delayed sexual maturity and decreased libido. Adult male animals that are kept at low nutritional levels for a long time have poor semen characteristics, weakened seminal vesicle secretion function, reduced fructose and citric acid in semen, and decreased spermatogenesis. Excessive nutritional levels can make adult male animals overweight, resulting in decreased libido. Insufficient calorie intake can cause incomplete development of reproductive organs and delayed estrus in young animals, and can cause no estrus, irregular estrus cycle, reduced ovulation rate and conception rate, delayed mammary development and increased mortality in newborn animals in adult animals. Deficiency of minerals and vitamins can cause anestrus. Phosphorus deficiency in grazing cattle and sheep can cause ovarian dysfunction, resulting in delayed estrus, less obvious estrus symptoms, and finally cessation of estrus; gilts and cows can suffer from ovarian dysfunction due to feeding manganese-deficient feed, less obvious estrus symptoms, or even no estrus; lack of vitamins A and E can cause irregular estrus or no estrus.

7 Animal B-ultrasound analysis of reproductive diseases

Anestrus is no estrus, which refers to the state of complete lack of sexual desire in female animals without estrus. There are two types of animal anestrus: one is physiological anestrus. That is, the follicles develop rapidly due to the animal being in the non-breeding season, before puberty, or during pregnancy or lactation, which results in anestrus. The second is pathological anestrus, which is caused by pathological reasons such as nutrition, aging, ovarian insufficiency, ovarian cysts, and persistent corpus luteum. During seasonal anestrus, there are no cyclical changes in the ovaries and reproductive tract. Lactational anestrus means that the ovaries have no cyclical activity during the anestrus period. Some animals are anestrus after delivery and during lactation, and the function of the ovaries is suppressed. Aging anestrus means that animals are anestrus due to aging after living for a certain number of years. This is a natural law. Female animals with incomplete ovarian development and immature reproductive tracts often do not show estrus. Ovarian cysts in cattle can cause anestrus to be prolonged. Due to pathological conditions such as uterine thickening, mucus accumulation, fetal mummification, abortion, and false pregnancy in horses, which is equivalent to corpus luteum retention, female animals do not estrus.