Types and prevention of reproductive disorders in sows

1. Functional reproductive disorders

These include ovarian dysgenesis, ovarian cysts, persistent luteal phase and follicular dysgenesis, which can be treated symptomatic with luteinizing hormone, prostaglandin, chorionic gonadotropin, pregnant horse serum, etc.

2. Nutritional reproductive disorders

Excessive amounts of high-energy feed can make sows obese, especially in the absence of exercise, resulting in obesity and infertility. Such as energy, protein deficiency, sow emaciated, the estrous period delayed or not, follicle development stopped, the formation of cysts. Vitamin A, vitamin B, vitamin D and vitamin E are indispensable vitamins for sows to maintain their normal reproductive function. Serious deficiency will affect conception rate and normal fetal development.

3, disease reproductive disorders

Sow reproduction and respiratory disorders syndrome: sow anorexia, elevated body temperature, visible abortion, stillbirth, premature birth, mummified fetus. Piglet mortality can reach 50%-70%, up to 100%.

(1) Parvovirus disease: especially when the sow produces stillbirth, abnormal fetus, mummified fetus, newborn piglet death or weak baby, but the sow itself has no obvious clinical manifestation, the infected sow may re-estrus or neither estrus nor litter. After 70 days, the infected piglets can be born normally, and the piglets are infected.

(2) Eperythrozoonosis: piglet high fever, yellow dye, anemia, death. Mastitis, lack of food and high fever occurred in late pregnancy and postpartum sows, and some sows aborted or stillborn.

Toxoplasmosis: Toxoplasmosis in pregnant sows will occur abortion, stillbirth, mummified fetus.

(4) atypical swine fever: clinical symptoms and autopsy changes are not typical, the incidence and mortality are low, the immunity of sows after infection decreases, causing reproductive disorders, pregnancy 10 days infection, embryo death and absorption by the body. 10-15 Day infection is stillbirth increased. Infections 1 week before birth did not affect piglet survival but development. Immunization with CSFV vaccine is the main control measure.