First, early detection of pregnancy
1. Look at heat. Under normal circumstances, sows do not have estrus after more than 20 days after mating, that is, they have basically registered; when the second estrus period is still not in heat, they can be considered gestational. Individual sows, after pregnancy, sometimes show estrus symptoms. This type of estrus is called a fake estrus.
2. Look at the action. After the breeding, the performance is quiet, snooze, eat very fragrant, increase food intake, easy to lick, fur is brighter and close to the body, the temperament becomes docile, action is steady, the phallo contraction, the joint under the vulva bends upwards, the abdomen expands gradually It is a symbol of pregnancy.
3. Urine test. In the morning, 10 milliliters of sow urine was collected and placed in a test tube. The proportion of pig urine is between 1.01 and 1.025. If the urine is too concentrated, it should be diluted with water. Normal sow's urine is alkaline, should add acetic acid, make it acidic, and then drip in iodine, slowly heated on the alcohol lamp. When the urine boils quickly, there will be a change in color: if it is a pregnant sow, urine will appear red from top to bottom, change from rose red to red bayberry, and look more obvious under sunlight; if not, The urine is pale yellow or brown green, and the color disappears quickly after the urine cools.
Second, the method to prevent sow fake hair
After the sow has become pregnant after mating, the estrus performance in the next affection period is called false estrus. Pay attention to the difference between false estrus and true estrus. The sham is not as obvious as the real estrus, and the estrus time is short. A day or two passes. The sow can be picked up and the sow's tail can hang naturally or with the tail in it, rather than swaying; the sow's sows no longer let the boar cross.
In order to prevent the occurrence of fake estrus in sows, it is necessary to strengthen the rearing of the sows during the second trimester of pregnancy. The nutrition should be sufficient to allow the sows to reach 90% or more of the sow; the sow's early lactation nutrition should be strengthened so that the sows can maintain moderate lye after weaning; Short-term excellent feeding improves the nutritional status of sows after mating and during early pregnancy, which is the fundamental method for preventing the sow's false hairs. In addition, prevention and treatment of sow reproductive tract diseases, good cold insulation work in early spring, and more feed green and juicy feed, but also to prevent false hairs.
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