Causes of stillbirth in pregnant sows

The causes of stillbirth in pregnant sows mainly include the following factors: 1. Factors in the epidemic As a result of bacterial diseases, the causes of stillbirths are: typical cases of brucellosis, pig listeriosis, streptococcus, and pig hooks. Leptospirosis; Causes of stillbirth due to viral infection: Swine fever, porcine parvovirus infection, swine pseudorabies, porcine reproductive and respiratory syndrome, Japanese encephalitis, and swine flu; factors related to stillbirth due to protozoal diseases: Toxoplasmosis, Eperythrozoonosis in pigs; In addition, Chlamydia disease causes stillbirth to occur in primiparous sows. 2, feeding factors sows lack of protein or essential amino acids, lack of trace elements calcium, phosphorus, iron, lack of vitamin A, vitamin B2, vitamin E can cause stillbirth; feed mildew, or eat poisonous or strong irritation Feed, causing poisoning and stillbirth. 3. The sow's own factor that the sow does not meet the standard influences the survival of the fertilized egg, leading to the death of the fertilized egg; the endocrine disorders of the sow and reproductive hormone imbalance cause embryonic death. 4. Management and environmental factors Heat stress reduces the gonadotropin secretion in the anterior pituitary gland to affect sexual function, causing irregular estrus in the sow, embryonic death due to conception rate, poor ventilation, air pollution, ammonia, and other harmful gases, affecting the mother Breeding of pigs causes stillbirths; high temperatures and wet cooling reduce sows' feed intake and cause malnutrition, which is also the cause of stillbirth.

Lung Function Instrument Mouthpiece

Lung Function Instrument Mouthpiece,Plastic Disposable Mouthpiece,Medical Paper Mouthpieces,Disposable Paper Mouthpieces

Hengshui Qifei Paper Products Co. LTD , https://www.hengshuiqifei.com