据报道，怀孕母兔胎儿萎缩死亡率与母兔营养水平有关，交配后第9天观察受精卵着床数，超过正常营养水平的高营养水平的胚胎死亡率为44%，正常营养水平的只有18%。

It is reported that the death rate of pregnant rabbit is related to the nutritional level of the female rabbit. The number of fertilized eggs implanted on the ninth day after mating is 44%, the mortality rate of the embryo is higher than that of the normal nutrition level, and the death rate is 44%, while the normal nutrition level is only 18%.

供给种兔全价、平衡的营养物质，维持良好的种用体况是提高繁殖力的重要措施。目前多数养兔生产者配制饲粮中的能量，粗纤维基本可满足家兔的需要，但微量元素等或缺乏或使用不合理，造成母兔不发情、不排卵、受胎率低，即使受胎，胎儿死亡率、畸形率、流产率也高，公兔性欲降低、配种能力差。

Nutrient supply, rabbit full price balance, maintain good for body condition is an important measure to improve productivity. At present most rabbit producers in the formulated diet energy, crude fiber can meet the basic needs of the rabbit, but the lack of trace elements or or unreasonable use, cause females not estrus, ovulation, pregnancy rate is low, even if the pregnancy, fetal death, malformation rate, abortion rate is high, decreased libido and mating in male rabbits poor.

为此，对于繁殖种群，除了满足能量、粗蛋白、粗纤维等营养外，还必须添加锌、锰、铁等微量元素和维生素A、维生素D、维生素E等。

Therefore, for breeding population, besides energy, crude protein, crude fiber and other nutrients, we must add zinc, manganese, iron and other trace elements and vitamin A, vitamin D, vitamin E and so on.

冬春季节青饲料不足，种兔要添喂胡萝卜或大麦芽，以利配种受胎。据笔者试验，对于集中配种的公兔每天添喂生鸡蛋25克，可明显提高配种受胎率。

Lack of green fodder in winter and spring, rabbit to feeding carrots or malt, and insemination. According to the test, the concentration of breeding male rabbits daily feeding raw egg 25 grams, can significantly improve the conception rate.

前者活胎儿数平均为3.8只，后者为6只。因此，怀孕期间不宜过度追求高营养水平，这样可减少胚胎死亡率，提高母兔产仔数。NRC(美国科学研究委员会)的怀孕母兔营养水平：消化能10.46兆焦，粗纤维10%～12%，粗蛋白15%，钙0.45%，磷0.37%。

The average number of living fetuses in the former was 3.8, and the latter was 6. Therefore, during pregnancy, it is not suitable for excessive pursuit of high nutrition level, which can reduce the mortality of embryos and increase the number of mother rabbits. NRC (National Science Research Commission) recommended nutrition level of pregnant rabbits: digestive energy 10 trillion and 460 billion Jiao, crude fiber 10% to 12%, crude protein 15%, calcium 0.45%, phosphorus 0.37%.

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