How to diagnose whether the sow is pregnant? It is easy to judge by mastering these three methods.

According to the pregnancy date of sows, it can be divided into three stages: early stage, middle stage and late stage. In the early stage: observe the changes in the shape of sows, the eyes are alive and the temperament becomes gentle, which represents conception, which can be judged by iodination method, finger pressure method and hand kneading method. Mid-term: if you are not in estrus about 20 days after mating, you may become pregnant, you can also use a pregnancy tester, you can also observe the nipples of sows, and if you can obviously blacken, it means that you have become pregnant. Later stage: after conception, you can feel fetal movement by touching tripe with your hand.

I. early diagnosis

First of all, we should carefully observe the changes in the appearance of the sow, such as the eyes are active, the temperament suddenly becomes docile, the action is more stable than before, the fur is shiny and shiny and clings to the body, and the pubic joint bends upward and contracts to form a line, indicating that she is pregnant.

1, iodination method: can take 10ml sow urine, and then according to the ratio of 1.0-1.025 into the container, pay attention to the urine can not be too concentrated, otherwise to add the right amount of water for dilution, otherwise the test results may be wrong. Add a little acetic acid to make the alkaline sow urine acidic, then drop appropriate amount of iodine and slowly heat it on the alcohol lamp or gas lamp. When the sow urine is heated to a certain temperature, its color change can be observed, and it can be observed more obviously in the sun. The urine of a successful pregnant sow can be clearly seen red from top to bottom, and if it appears yellowish or even brownish green, and the color disappears quickly, it means that you are not pregnant.

2. Finger pressing method: first of all, find the place from the 9th thoracic vertebra to the 12th thoracic vertebra of the sow, and then press the sow with your thumb and index finger, and the depression in the middle of the sow's back means that there is no conception; on the contrary, it is raised or completely unresponsive, indicating that it has been successfully conceived.

3. Hand kneading method: about 3 days after sow breeding, you can gently squeeze the second-to-last pair of nipples of the sow, you can obviously see a hard milk duct, which can also indicate that you have successfully conceived.

Second, mid-term diagnosis

18-24 days: the sow is no longer in estrus more than 20 days after mating, and the pregnancy can basically be confirmed. In addition, sows have a sudden increase in appetite, abdominal fat and other phenomena, indicating that they have become pregnant.

25-30 days: pregnancy tester test, the accuracy is 99%.

30 days later: the nipple of the sow began to blacken obviously, indicating that she was pregnant. The dilation of the nipple is observed from the back of the sow, and the mammary glands protrude obviously, which can be regarded as one of the reactions of pregnancy.

Third, late diagnosis

After 70 days of pregnancy, the fetal movement can be easily felt by touching the mother tripe. 80 days later, when the sow lies on its side, the fetal movement is obvious and the abdomen is very dilated. Thickened nipples and protruding breasts all indicate that the sow has successfully become pregnant, and the average gestation date of the sow is about 114 days.