A fetus is an embryo that died early in the womb of a long-haired rabbit and was gradually absorbed by the uterine mucous membrane. Without any miscarriage, the pregnancy ceased. There are many reasons for producing chemical fertility, mainly in the following six aspects.
First, the ambient temperature is too high
During the gestation period, the temperature and humidity of the rearing room are too high, especially when the temperature exceeds the critical temperature, the resistance of the female rabbit is reduced, and the phenomenon of fetalization occurs.
Second, the female rabbit weight loss
The female rabbits are thin, weak in physique, have thin uterine mucosa, lack of nutrition, and cause embryonic formation due to inadequate nutrient supply after implantation of the embryos.
Third, fertilized egg vitality is weak
After the combination of sperm and egg with weaker vitality, the development of the embryo will stop at a certain stage. In the production of middle-aged male rabbits with old female rabbits, young male rabbits with old female rabbits, old male rabbits with young female rabbits, young male rabbits with young female rabbits, etc., are prone to chemical fetal empty.
Fourth, the reproductive tract organic disease
Female uterus and vaginal inflammatory lesions during pregnancy, endanger the uterine mucosa, there is a chemical phenomenon.
Fifth, moldy feed for the mold during pregnancy
In some farms, gravid females are fed moldy feeds, grass powder, etc., causing diarrhea in the female rabbits, which leads to a decrease in physical fitness and the appearance of a fetus.
VI. Long-term lack of vitamins related to reproduction in feed
When feeding, the green feed is not fed all year round, and when the fiber is supplemented with hay powder, vitamin supplements are not paid attention. In particular, vitamin A, vitamin E, vitamin B1 and other trace elements are not valued, resulting in the formation of a fetus.
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