What effective measures are there for sows that do not come into estrus and sows that fail to conceive after repeated matings
What effective measures are there for sows that do not come into estrus and sows that fail to conceive after repeated matings
To promote normal estrus and ovulation in sows that do not come into estrus and sows that fail to conceive after repeated matings, on the basis of strengthened feeding and management, the following estrus-inducing measures can be taken:
1. Teasing: Use a teaser boar to chase sows that have long failed to come into estrus, or pen the boar and sows together in the same pen; stimulation such as contact and mounting by the boar can promote estrus and ovulation.
2. Hormone-induced estrus: Commonly used hormones include pregnant mare serum, chorionic gonadotropin, and synthetic estrogens.
3. Udder massage: Massage the udder for 10 minutes every morning for 3 to 5 consecutive days, which can promote estrus in sows.
4. Group penning: Raise sows that do not come into estrus together with sows that are in estrus; mounting by the sows in estrus can promote estrus and ovulation in the sows not in estrus. Increased exercise is also beneficial for estrus in sows.
1. Teasing: Use a teaser boar to chase sows that have long failed to come into estrus, or pen the boar and sows together in the same pen; stimulation such as contact and mounting by the boar can promote estrus and ovulation.
2. Hormone-induced estrus: Commonly used hormones include pregnant mare serum, chorionic gonadotropin, and synthetic estrogens.
3. Udder massage: Massage the udder for 10 minutes every morning for 3 to 5 consecutive days, which can promote estrus in sows.
4. Group penning: Raise sows that do not come into estrus together with sows that are in estrus; mounting by the sows in estrus can promote estrus and ovulation in the sows not in estrus. Increased exercise is also beneficial for estrus in sows.