Analysis of the causes of metaplasia, stillbirth and abortion in pregnant sows

   1. Causes of metaplastic fetus, stillbirth and miscarriage:

   (1) due to poor egg quality or lack of timely mating, the egg aged prematurely. Although it could avoid forced fertilization, the embryo could not develop normally and eventually died and was absorbed by sows.

   (2) pregnant sows lack the necessary protein, minerals and vitamins, especially calcium and phosphorus, as well as vitamins An and D, resulting in embryo death.

   (3) overweight or long-term constipation in pregnant sows affect the normal development of the fetus, resulting in metaplasia, stillbirth or miscarriage.

   (4) if feeding moldy and deteriorated, toxic and strongly irritating feed, resulting in feed poisoning and abortion.

   (5) Mechanical stimulation, such as uneven playground, freezing, driving too quickly, causing sows to slip. Narrow doors, crowded entry and exit, shock and so on will cause sows to miscarry.

   (6) has a high degree of inbreeding, which often leads to the number of stillbirths, sometimes malformations, freaks, etc. "

   (7) sows can cause stillbirth and abortion due to irritable disorder, few diseases, high fever, Japanese encephalitis, influenza, brucellosis and so on.

The picture shows: sow

   2. Methods to prevent metaplasia, stillbirth and miscarriage:

   (1) feeding pregnant pigs to maintain the fat condition of the breed and ensure that the fetus can obtain all the nutrients necessary for growth and development. Pay special attention to the adequate supply of protein, minerals and vitamins, and ensure the quality of protein.

   (2) prevent feed poisoning: moldy cereals, undetoxified cottonseed cakes, rapeseed cakes, potato stems and leaves, castor leaves and feeds containing pesticide residues, acidic silage, powder and dregs, and distiller's grains with high alcohol content should be avoided as far as possible to feed pregnant sows. The feed concentrate or mixture of the feed farm is moldy and deteriorated and cannot be fed.

   (3) pay attention to the management of pregnant sows: prevent crowding, bites, slips, whipping, frightened chase, sharp turns and other avoidable mechanical injuries.

   (4) try to avoid unnecessary and unplanned inbreeding.

   (5) do a good job in the prevention and treatment of epidemic diseases, especially for the prevention of Japanese encephalitis and influenza and other diseases.

   3, calming the fetus and induced abortion: in the sow pregnancy, if less than the normal delivery period, it is found that eating or not eating, abnormal behavior, mental illness, vaginal redness and mucus flow, continuous remorse, may lead to miscarriage. Immediately inject 15-25 mg of luteal carcass and take a sedative to calm the tire. If you have reached the parturition period, have the performance of giving birth, the breast expands and secretes milk, but there is no fetal movement and no fetal output, and the abdomen gradually shrinks, it may be that the dead fetus has become a mummified fetus in the womb, such sows should take the method of induced abortion as soon as possible to promote the complete discharge of stillborn fetuses, otherwise it will affect future reproduction. The easiest way is to inject it with 3ml of oxytocin. There are also such sows, there is no stillbirth after induced abortion or no stillbirth, but after a period of time, it is in estrus again, which may be excreted in the absence of the breeder and has been swallowed by the sow. It may also be an illusion caused by endocrine disorders in sows.