The cocks showed primary spermatozoid cells in the testis of 6 weeks old, secondary spermatocytes were present at 10 weeks of age, secondary spermatocytes at 12 weeks of age divided into sperm cells, became spermatozoa, and reached sexual maturity at 20 weeks of age. After 22 weeks of age, it is possible to breed, in order to obtain a higher fertility rate. The fertilization rate of male and female hens is too low for premature mating. Only when the male and female hens are in the same period of sexual activity, the fertilization rate of eggs is the highest.
The rooster is used for mating from 22 weeks of age and can be used until 72 weeks of age, and its fertilization rate does not decrease. The rooster can be used for 3 years. The hens were bred and bred from the 26-week-old hens and reared for another 48 weeks. Within this age range, the fertilization rate of eggs can be as high as 86.3%. Excellent breeding hens can be used for 2 to 3 years.
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