How to prevent embryo resorption in sows? Practical tips shared

1. Strengthen the management of sows before conception. From 3 to 14 days before mating, increase protein feed and energy feed, and add minerals and multiple vitamins at the same time, so that they enter the best state for mating more quickly. For thinner sows, strengthen nutrition for a longer period before mating, and restore their strength as much as possible, so as to facilitate mating, conception, and pregnancy maintenance, and increase the farrowing rate.

2. Mate at the right time. Sows begin to ovulate 24 hours after estrus. In terms of estrus signs, when they change from an excited state to a quiet state, with white thread-like mucus flowing from the vagina, and when the sow stands still when her back is pressed by hand, this is the best time to mate. In this way, the embryo mortality rate is low and the farrowing rate is high.

3. Regulate the endocrine system. One week after mating, inject each sow intramuscularly with 30 mg of progesterone, which can effectively reduce embryonic death and prevent stillbirth in sows.

4. Pay attention to feed quality. During pregnancy, sows should not be fed moldy, frozen, or otherwise contaminated feed. Otherwise, poisoning is likely to occur. In mild cases, it causes embryonic death; in severe cases, it affects the sow's life safety.

5. Maintain the ambient temperature. During the first week of pregnancy in sows, when the ambient temperature reaches 32°C to 35°C for a short time (24 hours), embryonic death increases. Likewise, if a boar that has been exposed to heat is used for mating, it will also cause embryonic death. Therefore, it is best to keep the ambient temperature at 15°C to 25°C.

6. Appropriate exercise. If sows do not exercise often during pregnancy, the embryo mortality rate is about 0.5% higher than that of sows that exercise regularly. The exercise method for sows should mainly be free movement, but sows must be prevented from falling or colliding with obstacles. Guan Wenquan