The cause of ewe's non-estrus and its solution

Ewes still can not cause estrus after sexual maturity, or postpartum non-estrus, which will seriously affect the fecundity of ewes, and it is also a loss for farmers. So what are the reasons why ewes are not in estrus? How to solve the problem? Let's take a look.

1. Lack of nutrition

Sheep can not synthesize vitamin A, can only be ingested through the outside world, must feed or graze to eat grass, there is more vitamin A, but for house-fed sheep, silage and rice straw as the main feed is very easy to sheep lack of vitamin A. When certain ewes lack vitamin A, there will be neurological symptoms in the ewes and lambs born, and even blindness, while the lack of zinc will also lead to miscarriage and deformities, and the lack of ferocity is obvious that there is no estrus and infertility, even if the pregnancy period is prolonged, the lambs born will be congenitally insufficient. In feeding, we should pay attention to the proportion of trace elements to ensure uniform dietary nutrition to meet the overall nutritional needs of ewes.

2. Management mistakes

In breeding will lead to physical loss of ewes in obesity, will also cause infertility, ewe body is too thin, malnutrition, follicles will shrink to a certain extent, the formation of persistent corpus luteum, resulting in infertility. In order to pursue fatness, many farmers feed a large amount of fattening concentrated feed, resulting in a large amount of fat near the ovaries, affecting follicular development and leading to infertility. It is suggested that ewes should not be fed with fattening concentrated fertilizer as far as possible. If the fatness is not good, expanded soybean powder and fried goose soybeans can be added to the feed to achieve the effect of gaining weight. For physical emaciation, obesity together with infertility, you can use anti-yellow agent to promote corpus luteum dissolution, sick sheep can re-estrus to conceive.

3. Endocrine malnutrition

The endocrine function is regulated directly after animal reproduction, once the endocrine disorder, such as insufficient secretion of estrogen, hypothyroidism, aging, ovarian dysfunction and so on, will directly or indirectly affect the reproductive performance, resulting in ewe non-estrus or infertility. So it should be checked regularly. The rectum can check whether the ovarian follicles are developing well, and if the follicles are not found, it may be caused by insufficient secretion of estrogen or ovarian insufficiency, it is best to take corresponding measures to prevent it; if the ovary is atrophied, the texture is hard or there is a hard focus on the surface of the ovary, it should be treated as insufficient secretion of estrogen.

4. artificial aphrodisiac

For young ewes without estrus, a small dose of gonadal hormone can be injected intramuscularly to promote the development and maturity of reproductive organs and cause oestrus, but the dose of gonadal hormone should not be too high, so as not to cause a decrease in gonadotropin secretion. cause more serious reproductive disorders, it is also possible to cause estrus after the first estrus will not be re-estrus.

The above is the ewe non-estrus reasons and solutions, hope to help you, want to know more related knowledge, please pay attention to us.