Mainly due to improper feed mix, too single, incomplete nutritional value, malnutrition and so on. The lack of protein, minerals (such as: calcium, phosphorus, selenium, zinc, copper, iron, etc.) and vitamins in the female rabbit diet, especially in the absence of carotene and VE, can easily lead to the termination of fetal development, resulting in miscarriage, weak output Fetal, soft or incompetent.
In the absence of vitamins and minerals, the maternal body's adaptability to the living environment and its resistance to the disease are reduced, and it can also cause stillbirth. Vitamin A deficiency, the lack of promotion of epithelial tissue function, often leading to uterine mucosa and chorionic epithelial cells keratinization, loss, so that lack of placental function "adhesion", easy to detach the fetal membranes, resulting in stillbirth. In the absence of vitamin E, embryos die in the early stages of embryonic development and are absorbed by rabbits, commonly known as "debridization." The lack of vitamin E in late pregnancy is easy to deliver prematurely.
When minerals lack calcium or phosphorus, or trace elements such as selenium, zinc, copper and iron are lacking, the lack of fetal nutritional supply may cause fetal development to be interrupted or produce weak and deformed fetuses. The sudden change of feed during pregnancy stimulates the fetal nutrient absorption, but also can easily cause stillbirth and miscarriage.
Toxic stillbirth abortion
Feeding moldy, spoiled, and deteriorating feeds can easily lead to abortions of female stillbirths. For feeding overdrinked rapeseed cakes, feeds with smut, rust, feeds with bitter, spicy feeds, feeds with high acidity, feeds with pesticides, feeds with corrupted animal feeds, etc. All can cause female rabbit poisoning, resulting in digestive system disorders, fetal development interruption, direct stimulation of the uterus and stillbirth and miscarriage.
When a rabbit suffers from a disease after pregnancy, it can also cause miscarriage when it is fed with a large number of laxatives, diuretics, uterine contractions, or other potent drugs.
For rabbits, injecting vaccines is a strong stimulus and will inevitably trigger stress responses. Therefore, vaccinating pregnant female rabbits often causes miscarriage.
Mechanical stillbirth abortion
Various mechanical factors can cause miscarriage. Pregnancy diagnosis techniques are unskilled and can not correctly identify embryos and dung balls. Kneading the embryos for a long time will cause damage to the embryos. If the operation is rude, they may even pinch the embryos.
Hairy rabbits should refrain from plucking hair after pregnancy, otherwise it will affect the normal development of the fetus and cause miscarriage.
Feel free to catch pregnant female rabbits, pick up and move rough, improper method of Baoding, pregnant female rabbits are frightened or hurt, most likely to cause miscarriage.
When free-range pregnant female rabbits are overly frightened, they will run around and desperately hide in the corners and dark places. If the abdomen is bumped or touched, it is easy to damage the embryos. Light causes miscarriage and produces stillbirth. Excessive noise can also cause miscarriage.
Sound and hunting dogs intruded and frightened. Some female rabbits are highly neurotic and have poor motherhood when producing their first litter. They also cause stillbirths. When a rabbit bites a frame and fights, it can easily cause miscarriage and stillbirth when holding, squeezing, pressing, biting, bumping, jumping, or falling.
The wooden burrs are exposed, the edges of the feeder trough are not perfect, the heads of the wood are protruding, the grid of the cage is too large, the iron wire of the cage is curled up, the floor of the rabbit house is damp, and the exhaust gas accumulates excessively. Under these circumstances, there may be injuries such as skin injuries. , foot fractures, bacterial infections, conjunctival inflammation and other diseases, pregnant rabbits suffer from serious damage, it will cause miscarriage.
Diseased stillbirth abortion
Abortion will occur when pregnant female rabbits suffer from haemorrhoids, flu, pox, Japanese encephalitis, pasteurellosis, clostridium perfringens, colibacillosis, enteritis, heatstroke and various parasitic diseases. Will produce still births, deformed tires.
Rabbits suffering from severe syphilis, malignant vaginitis, metritis, and other reproductive organ diseases do not easily mate and fertilize. Even fertilization often leads to miscarriage due to embryonic death.
In addition, due to inbreeding prone to make descendants of physical deterioration, prone to reproductive fetal abortion fetus, deformed tire.
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