Early mating of cows will affect their own health and growth and development. The yak is of weak constitution, small birth weight, and difficult to raise. Cows are affected by postpartum milk production. Therefore, the correct age of male and female cows should be correctly grasped. It is of great significance to improve the quality of cattle, give full play to its production performance and increase reproduction rate.
The growth rate of each organ after birth was basically the same, but the growth rate of reproductive organs accelerated at the age of 6 months and gradually entered sexual maturity. At this time, the eggs in the mother's ovary can be mature, can secrete sex hormones, have sexual desire and estrus performance, can ovulate, enter the puberty period. The cows at this time can mate, fertilize, and complete the pregnancy and embryonic development process.
However, the puberty cow is only the sexual organs begin to mature, but also need to go through the development of the pituitary gland, ovary, uterus, etc. to achieve full maturity, then the cow's entire body development will also mature. Normal cattle 20 to 30 months of age to achieve body maturity, you can arrange the first breeding, also known as the initial allocation. In the production of the first breeding (initial allocation) period, based on physical development, age is for reference only. The weight of a typical local cattle is 180 to 210 kilograms, and that of a modified cow is 250 to 280 kilograms.
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