What is the reason why sows give birth to weak piglets?
2021-01-15
1. Infectious diseases: sows are infected with Japanese encephalitis, parvovirus, pseudorabies, mild swine fever, blue-ear disease, brucellosis, etc., especially primiparous sows are likely to cause infertility and abortion. Infecting sows in late pregnancy causes stillbirths and weak litters.
2. Unbalanced nutrition or insufficient nutrition: the better the breed, the stricter the feed nutrition requirements. The sow will develop faster after pregnancy and need a higher level of nutrition, especially in the later stages of pregnancy. The development is very fast. If the nutrition is insufficient or insufficient, it will inevitably cause adverse effects on the mother and the fetus, giving birth to weak babies, and even miscarriage or stillbirth.
3. The influence of environmental factors: The summer high temperature and humidity environment persuades the entire reproduction process to be very unfavorable. Continuous high temperature appeared during the mating period, and the conception rate dropped significantly. When high temperature occurs in the first trimester of pregnancy, the number of early embryonic deaths will increase, the rate of return to estrus of sows will increase, or the number of litters will decrease. High temperature occurs in the late pregnancy, sows give birth to stillbirths and increase the number of weak piglets. High temperature and high humidity affect the secretion of hormones and cause endocrine disorders. The sows have decreased appetite and prolonged pregnancy.
E-mail:danong@great-farm.com
Tel:+86 371 5517 0327
Skype：zzjhny007