What do you mean the tire melted?

Embryonization refers to the early death of the embryo in the uterus and its gradual absorption by the uterus. The female rabbit was diagnosed as pregnant after mating for 8 ~ 10 days, but the embryo did not touch after a few days, and there was no abortion or calving.

There are many reasons for abortion. First, due to the poor quality of sperm eggs, the fetus died early; Second, because the maternal internal environment is not suitable for fetal development, fetal development is terminated early; Third, due to the external environment. Such as inbreeding, long-term lack of nutrients such as vitamin A, vitamin E and trace elements in feed, maternal obesity or emaciation, high temperature climate in early pregnancy, poor semen quality of male rabbits, chronic inflammation of reproductive tract of female rabbits, aging of breeding rabbits, moldy feed and overdose during pregnancy may all lead to early embryonic death.