Sow mating has been pregnant, but the occurrence of estrus symptoms in the next estrus is called false estrus.
(1) The difference between wig and true estrus
1 The fake estrus is not as obvious as the real estrus, and the fake estrus time is short, only 1 to 2 days passed.
2 The keeper enters the sow bar and raises the sow. If the sow's tail is hanging naturally or with her tail in it, instead of swinging, the sow is pregnant and the estrus is false.
3 The main difference is that the gilt sow does not allow the boar to climb. In addition, sows with fake estrus are more common in pig farms with poor feed conditions, and less common in pig farms with better feed conditions.
(2) Causes of false estrus The level of progesterone in the normal sow of sows is higher than that of estrogen. When the sow’s nutritional status is poor at the beginning of pregnancy, especially when there is a serious shortage of protein and vitamin B, the level of estrogen will increase. False estrus phenomenon. In addition, when the climate is changeable and reproductive organs suffer from diseases such as ovarian swelling, false estrus can also occur.
(3) Preventive measures Through various aspects of work, it is possible to prevent the occurrence of false heat.
1 To strengthen the nutrition of the sow during the later period of pregnancy so that the sow can reach the upper body condition; and then strengthen the nutrition of the sow during the early lactation so that the sow can maintain the medium body condition after the weaning of the piglets.
2 The implementation of short-term excellent feeding and breeding with excellent feeding improves the nutritional status of sows before and after mating, and this is the most fundamental measure.
3 Prevention and treatment of diseases of the sow's genital organs and prevention of cold and warmth in early spring also play a role.
More than 4 feeding green feed is also an effective measure.
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