Causes of anestrus in sows and preventive measures

Sow anestrus means that sows do not show a physiological state of the estrous cycle, it is a reproductive disorder, resulting in the decline of sow reproductive performance, resulting in damage to the economic benefits of the farm. So what is the reason for the sow's lack of emotion? Let's take a look.

First, the factors causing the anestrus of sows.

1. Weightlessness during lactation

Sows lack of feed during lactation, and the weight of sows in summer after weaning will have a certain effect on the interval between weaning and estrus, so sows need to maintain a certain body weight after weaning as soon as possible.

2. The temperature is too high

Excessive temperature will lead to empty pregnancy in sows, resulting in ovarian dysfunction in sows. It affects the hormone balance of sows, hinders the development of follicles and leads to anestrus.

3. Feed mildew

If the sow is fed moldy feed, the normal endocrine function of the sow will be damaged, resulting in anestrus or anovulation.

4. Low nutrition level

Lack of manganese and vitamins in feed will also cause ovarian dysfunction in sows, resulting in non-obvious estrus or non-estrus in sows.

5. Boars are not stimulated enough.

When sexual mature boars are used to stimulate reserve sows, proestrus can be advanced by about 30 days, and the effect can be achieved by contacting boars and sows for 20 minutes a day, but the effect of stimulation with one boar is lower than that of multiple boars.

6. Disease factors

In sows suffering from swine fever, blue ear disease, rabies and other disorders, or mastitis, endometritis and other diseases will also cause sows anestrus.

II. Preventive measures

First of all, the age and overgrowth of sows should be strictly controlled to ensure that the sows after weaning have a certain fatness, and fat can be added to sows in hotter areas to make up for low feed intake. When the temperature of the pig house is high, the temperature of the pig house can be reduced by ventilation, reducing feed density and installing spraying facilities. Forbid to use any moldy feed, mix a small amount of mycin adsorbent into the feed, and pay attention to supplement the vitamins and minerals in the feed to ensure adequate and comprehensive nutrition. One week before and after sow birth, liganomycin should be added to the feed to promote uterine contraction, purify the uterus and prevent postpartum MMA in sows.

The above is the introduction of sows' lack of estrus and preventive measures. I hope I can help you. If you want to know more about it, please follow us.