What to do about sow anestrus? Master the causes and preventive measures

Sow anestrus refers to a physiological state in which sows do not show an estrous cycle. It is a reproductive disorder that reduces the reproductive performance of sows, thereby causing economic losses to farms. So what causes sow anestrus? Let's take a look.

I. Factors causing sow anestrus

1. Weight loss during lactation

Insufficient feed for sows during lactation, and the body weight of sows after weaning in summer, have a certain effect on the interval from weaning to estrus. Therefore, for sows to come into estrus as soon as possible after weaning, a certain body weight needs to be maintained after weaning.

2. Excessive temperature

Excessively high temperatures can cause sows to remain empty, leading to ovarian dysfunction in sows. It affects the hormone balance of sows, hindering follicular development and causing anestrus.

3. Moldy feed

If sows are fed moldy feed, their normal endocrine function will be disrupted, causing them to show no estrus or no ovulation.

4. Low nutritional level

When feed lacks manganese and vitamins, it can also cause ovarian dysfunction in sows, causing sows to show indistinct estrus or no estrus.

5. Insufficient boar stimulation

When using sexually mature boars to stimulate replacement gilts, puberty can be advanced by about 30 days. Simply having the boar and sow in contact for 20 minutes per day can achieve the effect, but the effect of stimulation with one boar is lower than stimulation with multiple boars.

6. Disease factors

When sows suffer from obstructive diseases such as swine fever, blue ear disease, and rabies, or suffer from diseases such as mastitis and endometritis, it can also cause sow anestrus.

II. Preventive measures

First, strictly control the age at first mating and excessive growth of sows, and ensure a certain body condition of sows after weaning. In hotter areas, fat can be supplemented to sows to compensate for low feed intake. When the temperature in the pig house is high, ventilation and cooling, reducing stocking density, and installing spray facilities can lower the temperature in the pig house. It is forbidden to use any moldy feed for feeding. During feeding, a small amount of mycotoxin adsorbent can be mixed into the feed. At the same time, attention should be paid to supplementing vitamins and minerals in the feed to ensure sufficient and comprehensive nutrition. One week before and after farrowing, lincomycin should be added to the feed to promote uterine contractions, cleanse the uterus, and prevent postpartum MMA in sows.

  The above is an introduction to the causes of sow anestrus and preventive measures. We hope it can help you. To learn more related knowledge, please follow us.