Quickly and accurately determining whether the sow is pregnant can not only prevent the waste of feed caused by the empty pregnancy of the sow, but also improve the production performance of the entire pig farm and reduce the number of non-productive days of the sow. Therefore, accurately judging whether the breeding sow is pregnant is of great significance to pig production.
How to practice a pair of fire eyes golden eyes of wisdom, do not use B ultrasound, through the naked eye can accurately determine whether the sow is pregnant, the following we will change the physiological characteristics of the sow from the pregnancy period, very simple and accurate to determine whether the sow is pregnant, I hope to bring some help to your pig production.
Urine test
Sow morning urine 10 ml after 5 to 10 days after breeding, and then add 5% iodine wine 1 ml or vinegar 1 ml, heated to the boiling point, pay attention to observe the color change, if the urine is red, you can judge that the sow is pregnant; if the urine is pale yellow or brownish green, and the color will disappear after the urine is cooled, it can be judged that the sow is not pregnant.
Judged according to the estrus cycle
This method is more accurate for sows with a normal estrus cycle. Under normal circumstances, after the sow is mated in heat, after a estrus cycle (19-23 days), it can be preliminarily judged that it is pregnant.
Judging according to sow behavior and external characteristics
If the sow shows snoozing and voraciousness after breeding, the temperament is docile, the skin recovers quickly, the fur is bright and close to the body, the abdominal circumference gradually increases, the pubic gate is dry, shrinks into a line, and the tail droops; or the subvullary joint gradually contracts and closes, obviously upwards, indicating that it is pregnant.
Look at the breast method
3-4 days after mating, gently pinch the second pair of nipples of the sow with your hand, and if a hard milk tube is found, it means that you have conceived. About 30 days after breeding, observe the color change of the sow's nipple, if the nipple attachment part is black and purple halo, and begin to elongate to indicate conception. Or observe the arrangement of the nipples from between the two hind legs behind the sow, and you can see that the front of the nipple is open outwards, and the base of the nipple is swollen and raised, which also indicates that it is pregnant.
Observing the sow behavior method
Pregnant sows like to be quiet and do not like to move, while empty pregnant sows like to move; pregnant sows have a better appetite, and when feeding, it is often pregnant sows who eat fast, while those who eat slowly are not pregnant.
Watch the tires move
Fetal movement can be touched after 70 days of pregnancy, and after 80 days, the fetal movement of the sow's abdominal wall can be seen when the sow lies on its side, and the abdominal circumference is significantly increased. If the pregnant sow finds fetal movement in the place where the second or third nipple is counted in the front, it can basically give birth to more than 12 litters; if the third or fourth nipple is found to have fetal movement, the sow can give birth to about 10 litters. Fetal movement is behind the fourth nipple, then this sow has fewer litters, which should be less than 8. Using this method, you can basically judge the number of litters of sows.
Do not rely on B ultrasound, predict the number of litters of sows
If the pregnant sow finds fetal movement in the place where the second or third nipple is counted in the front, it can basically give birth to more than 12 litters; if the third or fourth nipple is found to have fetal movement, the sow can give birth to about 10 litters. Fetal movement is behind the fourth nipple, then this sow has fewer litters, which should be less than 8. Using this method, you can basically judge the number of litters of sows.