Why are half of the piglets born by sows dead and bright in color?

So first, let's see if this sow has a genetic defect. What is a genetic defect? In other words, whether your sow or boar bred with this sow has chromosome aberration is a defective disease. If so, I suggest you directly eliminate sows; Or use it instead of wild boar. We can't fix it because of this problem. If you want to identify whether the sow has this problem, you have to wait until the sow is in estrus again and mates with other boars. If such a problem still occurs, it can basically be concluded that the disease was brought from her family. Resolutely eliminate sows. If you want to identify a boar, you have to see if other sows that mate with it have the same problem. If so, you're welcome. This belongs to my husband's family. Yes Treat boars equally and resolutely eliminate them. If it is farmed artificially, switch to other pig essence.

Then it is to see if there is any intimate relationship between the male sow. This can also lead to fetal death. The only way to solve this problem is to prevent inbreeding; Avoid such problems. It's that simple.

On the other hand, there are nutritional factors:

If your feed lacks some nutrients, it is also an important cause of fetal death. For example, this sow lacks vitamins A, D, E, C, B2 and folic acid during pregnancy. Then, it may appear that your sow is alive and will die later; This is not surprising.

If your feed lacks minerals and trace elements such as copper, iron, zinc, selenium, calcium, phosphorus, manganese, chromium and iodine, especially iron, stillbirth will increase; If your sow is fed too much energy in the first three months of pregnancy and there is too much fat around the uterus, it will cause blood circulation disorder in the uterine wall, just like your legs will be numb if you cross your legs for a long time, right? But you can move. Link your blood circulation. But pig fat grows there. It cannot move, nor can it circulate to pigs through the placenta. What is systemic circulation? Simply put, it is the process of transforming substances in the body through the flow of blood. Let the piglets get nutrition and discharge waste. That's it. Poor circulation, natural lack of nutrition, even if alive is not healthy.

When the hemoglobin content of sows is too low, more stillbirths will be born; It's like a person can't get pregnant even if he is seriously deficient in qi and blood. Even if he is pregnant, he may sneeze and miscarry. The reason is similar. If the sow is too fat or too thin, it will lead to the slow delivery of the sow, that is, the labor process is too long, which will interrupt the oxygen supply to the placenta and lead to asphyxia or brain injury in piglets. Piglets tremble and even die. For example, describe brain injury: a woman is pregnant before marriage, and she is pregnant. Before the wedding, she stuffed her abdomen with a cloth bag and wrapped it around. One is good-looking, and the other is afraid of jokes from friends and relatives. As a result, the wedding lasted several hours, plus the bridal chamber. Over time, it will lead to stillbirth or give birth to a baby with cerebral palsy. A truth, right? Don't laugh, it's too complicated to describe.

It can be seen that the energy level and protein level in feed will affect the physical condition of sows. When the hemoglobin content of sows is too low, more stillbirths will be born; ∴ so; If so, it's all your own fault that caused the death of the pig and the sow is innocent.

In addition, in the early pregnancy of sows, high-energy feed will cause the decrease of plasma progesterone and damage to this embryo. Sows give birth less, and some of them are for this reason. Also, this moldy and deteriorated feed will lead to the death of fetal pigs; Some grasses can also cause endocrine disorders and eventually lead to fetal death. Most of the pigs in our family are raised in the countryside, with plenty of grass. Don't think you can do it without spending money. Don't mess with the green ones, you don't know the toxic ones, and it's over when you come back! Even if people eat more Chinese cabbage and pigs, they are poisoned, let alone unknown weeds. Although many grasses have medicinal value, they also have their side effects. So, we fed it. It's okay. We fed it. But you can't feed too much. You must measure everything. As the saying goes; You can't be greedy for delicious food. Let's not try things that we haven't fed or don't know. We are not a laboratory.

Prevention method: It is one thing that everyone knows, that is, scientific breeding, keeping the sow breeding state and keeping the sow at 80%. Feed the corresponding full-price feed according to different stages, and don't feed those moldy, toxic and irritating feeds. Feed the sow with green juicy feed or bran, which is a laxative feed to prevent the sow from constipation.

We can try to supplement perinatal sows with vitamin A, vitamin B2, vitamin E and calcium preparations, or inject appropriate amount of iron dextran and iron dextran to prenatal sows, or add appropriate amount of ferrous sulfate to feed to reduce fetal mortality. But pay attention to avoid mechanical abortion, and avoid it! !

Moreover, the age factor can also make this sow weak and stillborn. Generally, sows perform better in the third, fourth, fifth and sixth fetuses, and there is little difference in stillbirth. Later, with the growth of age, all kinds of performances showed a slow downward trend.

And the age of first mating will also affect the survival of the fetus. In addition, the sow's first mating age is generally 8~9 months, and its weight is preferably above 100 kg, preferably in the second or third estrus. Premature breeding of this sow, because the reproductive system of sow is not fully developed, leads to low conception rate, which is easy to cause abortion, dystocia and stillbirth. Like a car that hasn't run in yet, eager to make money, cut! Take a big job. Then don't boil the pot and stick to the cylinder. Right? This is possible. No matter how well you repair it, its performance is not as good as others'. Therefore, premature mating also affects the reproductive performance and service life of sows. At this point, I hope that friends who have just raised pigs will not be too anxious to make money and protect your rake.

Then there is prolonged pregnancy, which means full moon. It will also cause piglets to die in the womb because of crowding, tearing umbilical cord and suffocation. For a diagnosis like this, you can cut open the pig to see if there is feces in the trachea, or if a lung leaf is still in the water, if it can float, you can conclude that the pig died of dystocia and suffocation, no doubt.

Another point is environmental and management factors: for example, continuous high temperature will lead to an increase in early embryo mortality. In winter, pigsty changing, long-distance transportation, chasing and heavy ammonia will all have adverse effects on the physiological state of the mother and cause fetal death.

Try to reduce stress factors, and don't chase or beat pregnant sows. Try to keep the enclosure dry and clean to avoid the reproduction of harmful bacteria.

Add: There are also some reasons that lead to uterine hypoxia: that is, when pigs are born, the placenta contracts excessively, resulting in poor blood flow; Part of placenta is separated from uterus; Then in the end, because of the long migration distance of piglets in the uterus, the umbilical cord may break prematurely due to stretching or squeezing. After that, if the piglets can't give birth soon, they will suffocate. I suggest you pay attention to this point in the use of oxytocin: it's not my personal opinion, many people think so. Don't use it too early. Because in the process of sow production, the uterus is already contracting violently. And the uterus is not very thick. Plus it's full of piglets, very thin. Some people inject oxytocin as soon as the amniotic fluid of sows breaks, or inject it as soon as piglets are born, forcing the uterus to contract. If it is serious, it will lead to uterine rupture and all expenses will be reimbursed. Furthermore, another function of oxytocin is to produce such a prolactin effect in prolactin drugs within a short time after injection. Someone should have seen it. After oxytocin is injected into the pigsty, as soon as the sow pushes hard or changes her posture, the milk will flow out. You know, dystocia cannot be solved by oxytocin. If the fetal position is not correct, the piglet can't enter the birth canal. Must be assisted. A long time ago, someone said in our YY room that midwifery was used, which was good. If not, you have to use your hands. The method is also very simple. Wash sow genitals with 1% potassium permanganate warm water. How to calculate 1%? Brother Xi in our room said, just turn the water into cherry red. Wash your hands with soapy water, then use 1% potassium permanganate solution. You can also use disposable thin gloves. Apply lubricant, such as vaseline. Try to be hygienic. Reduce reproductive tract infections. Sows use their right hands on the left and their left hands on the right. Pinch the handle into a cone. Don't be rude, be gentle and take your time. ...

If the above can be done well, there will be weak stillbirth, mummy fetus and other phenomena, and it is easy for us to analyze what kind of virus is caused. Is it parvovirus, pseudorabies, Japanese encephalitis, toxoplasmosis or blue ear disease?