化胎是指胚胎在长毛兔的子宫里早期死亡，逐渐被子宫黏膜所吸收，没有任何流产的表现，妊娠就终止了。产生化胎的原因很多，主要表现在以下几个方面。

The embryo is the early death of the embryo in the uterus of the long haired rabbit, gradually absorbed by the uterus mucous membrane. There is no abortion, and the pregnancy terminates. There are many reasons for the birth of the fetus, which is mainly shown in the following aspects.

一、妊娠期饲发霉变质饲料

1. Gestation moldy metamorphic feed

有些饲养场给妊娠母兔饲喂发霉变质的饲料、草粉等，引起母兔腹泻，导致体质下降而出现化胎。

Some farms feed the pregnant rabbits with mouldy and metamorphic feed, grass powder and so on, causing diarrhea in the mother rabbit, resulting in the deterioration of the Constitution and the emergence of the foetus.

二、母兔消瘦

Two, emaciation of the mother rabbit

母兔消瘦、体质弱，子宫黏膜薄，营养不足，胚胎着床后因营养供给不足而导致化胎。

The mother rabbit is thin, weak physique, thin uterine mucosa and insufficient nutrition, and the embryo is caused by insufficient nutrition after implantation.

三、环境温度过高

Three. The temperature of the environment is too high

妊娠期饲养室温度、湿度过高，特别是温度超出了临界温度时，母兔抵抗力下降，出现化胎现象。

When the temperature and humidity of the feeding room were too high, especially when the temperature exceeded the critical temperature, the resistance of the mother rabbit decreased and the fetal phenomenon appeared.

四、受精卵生命力弱

Four. The vitality of the fertilized egg is weak

生命力较弱的精、卵结合后，胚胎发育到一定阶段就终止发育。在生产中老年公兔配老年母兔、青年公兔配老年母兔、老年公兔配青年母兔、青年公兔配青年母兔等，都容易出现化胎性空怀。

After the combination of sperm and eggs with weak vitality, the development of the embryo is terminated at a certain stage. In the production of elderly male rabbits with older rabbits, young male rabbits with older rabbits, aged male rabbits with young female rabbits, young male rabbits with young female rabbits, are prone to fetal sex nonpregnancy.

五、饲料中长期缺乏与生育有关的维生素

Five, the long-term lack of fertility related vitamins in the feed

饲养时常年不喂青绿饲料，以干草粉补充纤维时又不重视补充维生素，特别是不重视补充维生素A、维生素E、维生素B1等及微量元素，导致化胎。

They often do not feed green feeds at any time, and do not pay much attention to vitamin supplements when supplemented with hay powder. Especially, they do not attach importance to vitamin A, vitamin E, vitamin B1 and trace elements.

六、生殖道器质性病变

Six, organic pathological changes of reproductive tract

母兔妊娠期子宫、阴道发生炎性病变，危及子宫黏膜，出现化胎现象。

The uterus and vagina of the mother rabbit during pregnancy have an inflammatory disease, which endanger the uterine mucosa and appear the phenomenon of the fetus.

本文的精彩内容来自长毛兔详细内容请点击我们的网站: http://www.myxinhua.com谢谢您的到来!

The wonderful content of this article comes from the detailed content of the long haired rabbit, please click on our official website: http://www.myxinhua.com thank you for your arrival!